[cowbyfan1]

I'd be curious where it stated to use the bean bag to mark the spot where he went out. I have never heard this before.
I will also stick with the flag only. If a coach asks me where he went out I will tell him the same thing I told him originally, "number XX ran out of bounds on his own and reentered during the play." I will tell the WH where he came back in for penalty administration. I'll hang onto my bean bag for something more important, like a fumble or the end of a scrimmage kick.