At a tournament a couple of years ago that I was at, PU left to help cover a rundown between first and second... with R3 and 2 outs. R3 crossed the plate at some point around the time the tag was applied to R1. Since neither umpire had any idea if R3 crossed the plate before the tag or not, they (not kidding) flipped a coin to determine if the run counted or not. Somehow, both coaches agreed to this. (The offensive team won the flip and the run counted).