A shot a friends Beretta 92FS today at a range that allowed rapid fire. I loaded the mag and chambered a round. The trigger was in SA mode now *I guess*. Well anyway, I started to pull the trigger as fast as I could. The trigger was real easy to pull. Next thing you know, I shot a round in DA mode and the next round till the end was SA again. How in the heck did it go from SA to DA and back to SA? You follow??