I watched this the other night. I regret it.
Anyway, in the opening segment, a guy pulls out a SAK (looks like a Tinker to me), to open 3 bottles of beer. Because the writers are mentally deficient, they have the character open the large blade first, then the bottle opener. This is supposed to show that the guy is dangerous, but as it turns out that the frat-boy with the beers is the actual nasty, it is actually just really... REALLY bad writing.
Oh, the guy with the SAK ALSO has the Murder McMurder knife (a buck hunting knife) in his luggage. I hate bad writing in bad horror movies. You'd think I'd learn, but as with cheap multitools... Noooooooo!