Hot Tub Time Machine? Was humor not existent in 1986?

Four guys go back in time to the year 1986 (I was born that year) and meet Chevy Chase (who is awesome) and are confused by some frat boys for being soviet spys with some stuff from the future they found on the the four guys. Things that stand out are gay jokes, like alot of them, and the running joke of the bag boy losing his arm. For the most part the running arm joke was the most creative bit in the movie.
I'm not saying the movie was bad, just a bit to hyped up. One of my friends pointed out if you see it in theaters that you at least get a stub that is good for one "hot tub time" and thats never a bad thing.