Whistle in mouth?

[representing]

Unless I'm talking to a player on the lane, I have the whistle in my mouth and I'm off the block. Some referees in this area, not sure how it is elsewhere, will stand on the lane with the players until the final FT or 1-and-1. I used to do that but had a situation two years ago where I stood on the line forgetting it was 1-and-1 and not 2 or 3. Luckily it was a biddy wreck game, and not a two point game with seconds to go in a Varsity game.