I was at the same school, Rod Jenkins.
What I found is that I, in attempt to "pull Through". I seem to snatch the back tension, or to pull real quick, instead of smoothly. This caused the oscillation of the string to really amplify, and thus smack the tar out of my nose and lip. I am still working on this. Have the mark on the end of my nose to prove it. Slow and steady, do not turn into the bowstring. Set your head, draw anchor, pull through. try it.