The pitch
Beware Boiúna (2026)
Opening against Digger, this one will be fighting for the same weekend conversation.
The theatrical release lands October 2, 2026.
Reactr / Trailer Reactions / Beware Boiúna
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In Theaters · October 2, 2026
Beware Boiúna
Trailer Reactions
Scored from what 18 creators said on camera while watching the trailer, out loud, in their own YouTube reaction videos. A proprietary Reactr score. How the score works
R
Action · Horror · Thriller
Witness terror on a gigantic scale.
Deep in the Amazon, a medical mission spirals into a fight for survival when Boiúna, a colossal ancient predator, awakens to reclaim her domain. In the jungle where nature holds absolute power, she decides who lives and who dies.
Free · no editing · camera or voice only · the clip is yours to post
The Trailer
The official Beware Boiúna trailer, right here
Dropped September 23, 2026
More Trailers
More Beware Boiúna trailers, newest first
Trailer: Beware Boiúna (2026) Final Trailer - Kiana Madeira, Jessica Rothe, Logan Marshall-Green
React to this trailer →
The studio also posted 7 short promo clips for this title. The trailers above are the ones worth reacting to.
Creator Reactions
What creators said about the Beware Boiúna trailer
Creators posted 18 reaction videos to YouTube watching this trailer. Reactr scored what they actually said, out loud, on camera, and combined it into the Reactr Rating shown at the top of this page. The 12 that counted most are below. How the score works.
Um but yeah, we definitely go see it. We definitely got to go
I'm definitely going to go see this. And all right, y'all, that's going
which I thought was really good idea. I'm surprised that they didn't like go
Can't wait to check this out. Saw a thumbnail and
chainsaw and I was like, let's go Ash. Jessica Roth looks fantastic in this.
This next one I had not even heard of until you sent this to
Yeah, um this looks This looks good. A big monster. Uh I guess
Um especially Jessica Roth she's great I love Happy Death Day that's a good
I just seems so unnecessary. So many movies now are either non-entertainment
Boyuna That was a pretty good shot with her though. I like that.
Oh man, I love scary movies though, man. But hey, let me
Yeah, that looks good. I feel about this? That
Every reaction above is a creator's own upload on YouTube, credited to their channel. Reaction videos are found automatically; a creator can claim their page or ask for a video to be removed from the creator directory.
Reactr Verdict
Did Beware Boiúna deliver on its trailer?
76The trailer
18 reaction videos scored. See them all
18 reaction videos scored. See them all
?The film itself
scored from reactions posted after release
scored from reactions posted after release
Verdict comingafter opening weekend
After release, creators post a second kind of video, their reaction to the film itself. Reactr scores those the same way it scored the trailer reactions and puts the two numbers side by side to answer one question: did the movie live up to its trailer?
The credits that matter
The history behind Beware Boiúna
Constantin Film, JB Pictures and Jaguar Bite are behind the production. Mike P. Nelson directs, with writing credits for Alan B. McElroy and Tony Giglio. The finished film runs 1 hour 44 minutes. It carries an R rating in the US.
The cast
Who you’ll see in the trailer
The cast is fronted by Logan Marshall-Green, Kiana Madeira and Jessica Rothe. Logan Marshall-Green plays Brennan Malloy.
The reason to record this one
This trailer was made to be reacted to
A thriller trailer plants a question in the first ten seconds and spends the rest refusing to answer it. React to the wait.
Theatrical releases are won in the weeks before opening night, and trailer reactions are where that energy starts. Yours can be part of it.
Reactions on Reactr
Be one of the first to react
Reaction clips for Beware Boiúna will appear here as Reactors share them. The Reactr recorder is free for creators: watch the trailer, record on camera or voice only, and the finished clip is yours to post on your own TikTok, Reels, or Shorts channel.
Record the first reaction →FAQ
Beware Boiúna: quick answers
How do I make my own Beware Boiúna reaction video?
Open the reaction recorder on your phone at reactr.film/studio/beware-boiuna, choose camera or voice only, and press record while the trailer plays. Reactr captures your reaction and gives you a share-ready clip when the trailer ends. It is free.
Do I have to be on camera?
No. Voice Reaction mode records your commentary with the microphone only: the camera stays off, no face is recorded, and you still get a share-ready clip for your channel.
When does Beware Boiúna come out?
Beware Boiúna is scheduled to open in US theaters on October 2, 2026. Dates can shift, so check back for updates.
Who stars in Beware Boiúna?
Logan Marshall-Green, Kiana Madeira, Jessica Rothe, Jackson Bews and Juan Pablo Shuk lead the cast, directed by Mike P. Nelson.
Is Reactr free?
Yes. Recording reaction clips on Reactr is free, with no paywall on the finished clip. You own your clip and can post it to TikTok, Reels, Shorts, or anywhere else. Reactr makes money from studios and sponsors, not from creators.
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