Hot Tub Time Machine is just one of those movies that's difficult to review. Is it "good" by any kind of objective, critical theory-type film standard? Of course not, and it doesn't aim to be. It's absurd, the time travel doesn't make sense, the "happy" ending is actually really horrifying when you look at it at all closely, there's a lengthy scene involving a room full of people thinking the Black Eyed Peas are awesome -- a lot of it doesn't add up. But this movie's plot is really just a conceit to allow for numerous jokes about the '80s, and to facilitate a rapid succession of one-liners from a bunch of very funny comedians (Rob Corddry in particular is always funny, but he really shines in this movie -- I don't consider Hot Tub Time Machine "the next Hangover" as so many are claiming, but it is definitely his Hangover, in a Zach Galifianakis kind of way, if that makes sense).