My favorite is the cat knocking over the spaghetti-for ameriquest
http://www.youtube.com/watch?v=M7cUYVviK50
Allstate mayhem commericals.
And of course Isaiah Mustafa in the irish spring commericals-
http://www.youtube.com/watch?v=owGykVbfgUE
and
http://www.youtube.com/watch?v=3R2cnxz27LI&NR=1