For the majority of my high school career (2nd year in college now) I only hit kick serves because I would only serve and volley. For the last year and half, I've been trying to develop a flat serve to win some cheap points. Well yesterday, I was at a racquet-demo event at some local courts yesterday, and at one of the courts they had a radar gun available. Wanting to see the improvement I've made on serve, I tried my hardest to bomb some flat serves and I was getting in the 100 - 105 range. However, what surprised me the most is the fact that they were kicking ridiculously high for "flat serves". According to the others on the court, they definitely had the trajectory of a flat serve, but once they bounced they would kick maybe 6-7 feet upwards. I'm not a particularly tall guy, only about 5'11"-6', so I have no idea why my flat serves are still kicking. It's not that I mind it, I actually thought it was pretty cool, but I'm curious as to what could be causing this. The instructor with the radar gun told me that my knee bend was pretty massive and that it could be robbing my serve of speed and putting too much spin. Could that possibly account for having a flat serve with a kick?