What was your biggest mistake?

[MJT]

I screwed up an enforcement, which really pisses me off, when we had a defensive foul on the last play of the game and I forgot to tell the offense they could decline the penalty and the game would be over. The offense was ahead by about 20 and there was no bad blood, they just downed it, but I was kicking myself as we left the field and my wingman told me I screwed it up. Actually he tried to tell me before we ran the play, but I misunderstood what he was saying, so we ran the untimed down.