Streetlight's thing is always to call the crowd the best no matter where they are (Youtube it) and then act like every song is the last one in their set.
Also, Kalnoky would make up dates for the new album to come out when he teased songs from it, usually saying "...tomorrow!"
I liked how when they would sing Point/Counterpoint live, it would go "I've got a gun in my hand and the gun won't COCK!" and then they would go back to normal volume for the rest of the song.
