Use your mulligan?

[Rich1]

I step in, toss it high, and take a half step backwards - all with a whistle in my mouth. I have never been bumped, hit, pushed or otherwise assaulted during this process in many years of reffing. The key is to keep room between the players, delay a bit after stepping in, toss it high from shoulder heighth, and pull back a little bit out of the way so they don't come down on top of you. It might not be how others would do it but this works for me!