Maybe this has been posted already somewhere, but I ride the bus and I'm constantly assaulted by people sitting behind me who like to either 1) suck their teeth (okay, just get a toothpick already), 2) chomp and snap their gum, or 3) chew and chomp their food (which they shouldn't be eating on the bus) really really loudly. Sometimes I can get up and move, but sometimes I can't. I've taken to wearing my earphones constantly and that helps. God, I hate that. I'll put up with slurping or phlegmy, hacking coughs a lot more than those chomping noises or snapping gum. Ugh. Just grosses me out. I think loud cell phone conversations are the only things that come close.