Well, my two favourite plays in FRC aren't actually from 2013 at all.
One was from a match on Saturday at the 2012 Greater Toronto West Regional.
Human Player threw a shot AT the buzzer, no robots moving (all balanced on bridges), which ended up in the 1 pt goal on the far side of the field to tie the match. The arena went eerie silent, and erupted when it swished. Definitely one of the coolest moments I've ever seen in 10 years of FRC. I can't remember if it was an elim match or not.
The other is 67's brilliant play against the then rookie sensation of 1241 in this match from the 2004 Great Lakes Regional:
http://www.youtube.com/watch?v=VX8idlTOrA0
In 2004, 1241's human player had been cherry picked from their school's basketball team. He was stellar. Preventing their robot from feeding him balls like that is by far one of the most creative defensive maneuvers I've seen in 10 years of FRC.