[Howard Treesong]

While on a ski vacation with a friend's family, my friend's mom was correcting his table manners and generally telling him what to do. My friend was becoming visibly irritated, but clearly did not want to upbraid his mom in front of his dad. So he waited until his dad excused himself to use the restroom, then finally said: "Mom, stop. I'll use whatever fork I like, and, quite frankly, I'm 30 years old. You don't have to tell me to drink my juice carefully so as not to bang my teeth with my glass." His mom clearly felt bad, and a pall settled over the table. His dad returned and sat down, then picked up his wine glass -- and promptly banged his teeth while trying to take a drink.

My GF and I, as well as my friend and his mom, and two friends of theirs, instantly started howling with laughter. My friend's dad had absolutely no idea why everyone else was rudely laughing at his misfortune, and became progressively angrier as we continued to laugh. His anger only fueled our humor, and we ended up laughing so hard that nobody could explain to him why the whole thing was so funny.