Agreed that you're born with speed, but the 152 yard on the fly 9i seems within reason.
BTW, I used the swing speed radar and had a few rogue 128mph 18 degree hybrid shots. This was before my swing improvements, so the only thing I can think of is that the radar was measuring the ball speed and not club head speed. Even with my swing improvements, there's no way. No measuring device is perfect.
I agree with @MS256.
I don't know you - but in most cases it would be safe to assume that a 128mph hybrid is a misread.
As far as I can make out, some radar devices actually use measured ballspeed in an algorithm to determine clubhead speed.
All that said, spikes in speed of up to 10mph would be consistent with the occasional shot that travels an extra 20 yards or so. I'm sure we've all had those experiences on the course, whether or not there's been a radar there to verify the speed.