[Refsmitty]

I was working a scrimmage last night as U. I am learning the position but have a decent feel for it. During a break, another U spoke to me and said as U, he very rarely blows his whistle. Shortly thereafter, a run up the middle, I see the play in front of me, the leather, and the down... am not blowing the whistle - the kid gets blasted with a late hit - your thoughts and recommendations?