Hot Tub Time Machine is very funny and also very very vulgar . . . and what made it even funnier for Catherine and I is that once the credits were rolling, we noticed that the couple behind us had decided to bring their three year old daughter and eleven year old son to see it (they passed up Clash of the Titans and Diary of a Wimpy Kid and How to Train a Dragon) and though we didn't agree with their parental permissiveness, we had to admire their perseverance, as they stuck it out despite the film's constant use of the f- word, abundant and gratuitous nudity, frequent rape and fellatio jokes, and obtuse 80's allusions; although, I don't recommend it for the kids, we both laughed a lot . . . I give the film four out of a possible five Walkmen (Walkmans? Sony claims the plural is Walkman Personal Stereos).