The first time I fired my P09 I had to keep reminding myself that the holes I the target, the noise and the empties on the ground meant it really was firing off rounds. The recoil was so light it just didn't seem possible it was firing.
Of course, I'd just finished firing about 150 rounds of .357 SIG through my M&P FS. Recoil on that thing would occasionally destroy a CR123 in the streamlight attached to the frame. I lost three before taking the light off the pistol. The light would stop working, I'd remove the batteries and one of them would rattle when shaken, so something broke loose inside it from the recoil.