Due Date - I like Zach Galifianakis, and I really like Robert Downey Jr., but oh boy was this bad. They had zero chemistry together, and both characters were unlikeable.
It was supposedly a comedy but there weren't a lot of laughs. Unless you think a grown man punching a child in the stomach and spitting in a dog's face is funny, this isn't the movie for you. If you do think that's funny, then you have bigger problems. Not to mention they add a pointless Jamie Foxx cameo and imply he's the real father of RDJ's wife's baby. Apparently that also is supposed to be humorous.
2/10 - Gets a bonus point because there were a couple mild laughs, and it was only 90 minutes. Still, NOT recommended.