Straight Dope: Best of 2009

What was your favorite thread of 2009? Your favorite single post? The funniest? The most informative?

NOTE: This is a “best of” thread. If you want to list stuff you did not like, go start your own thread.

I posted this to Tripler’s The SDMB 2009 Awesome-est Post of the Year thread.

Scylla’s Wal*Mart thread.

Hamsters razor blades and eyebolts