S!
The 109 (G2 atleast) makes a relatively clean and controllable snap roll. Very quick reactions are needed of course. Left snap roll is done by pushing left pedal fully down, and pulling stick fully to rear right. And vice versa.
I once trained to make it at will... but in the heat of combat, not a chance
.. More of an aerobatic trick for me
... Would be of course an effective maneuver in scissors etc... if I just could make it