My brilliant screwup happened a few months ago. I was T, tableside, team A has the ball, coach B says "timeout". I didn't check who was calling the timeout, just blew my whistle. I swear coach B was trying to trick me because he knew I was a green official. Coach A went beserk, yelling "he can't do that!!!" I knew the rule was I had to administer the timeout once I granted it so I had to deal with it. Embarrassing to say the least. If that happens again, I will just yell "inadvertent whistle, ball OOB" and try to get the ball back into play before anyone realizes.