the thing is the move i pulled was a 360. in the last bit of the spin 9-12 oclock position he flew thrue my guns. It wasnt a 180 but a 360 
The concept is the same, first is that it is somewhat controlled (or, is initiated intentionaly, and recover-ed/able with a desireable/intended outcome), which is not easy since you're litteraly on the edge of stalling or mucking-up and stalling your ride
really badly and in combat. Second difficult task is getting the tail sliding horizontaly infront of the nose with the big heavy twirly thingy trying its best to 1)twist and 2) pull the aircraft - more of a physical art form in this game with certain aircraft than science.
Nor are you the first player to do this in AH in a 109. Do a forum search for the "Krupinski Reversal", he even has a short clip of it to go along with some helpful description if you find him.... I don't know about recently, but 2-3 years ago you had to be
real careful with exactly who the pilot was in the K4 on your 12 (!) before getting down too dirty in a knife fight with them.