A cult saying first made popular by MMORPG players in anticipation of the game Mortal Online, it was first said by
Kudo Sinoda during the Xbox 360
project Natal demonstration for E3 2009.
During the demonstration the motion sensors responded horribly sending the on screen avatar into some kind of epileptic fit.
The term was first made popular in Mortal Online IRC channels, where Sampzky and other Mortal Online Beta applicants watched the live E3 2009 press conference together in the IRC channel.
Today, the term 'WAH BAM!' is used to express total failure; failure which is usually executed in a retarded or spasticated fashion.
The full quote is as follows:
Kudo: "You ever wonder what the bottom of an
avatar's shoe looks like?
WAH BAM!"
*Onscreen avatar cripples and flails horribly*
Kudo: "There it is...?"
Player 1: Hey, lads! Watch me solo this boss mob!
....
Player 1: I forgot my
armour and weapons and
FarmerJoe killed me :(
....
Player 2:
WAH BAM!!!!