Now I am a High School official...Which I know the rules better but I do love the NFL.

If your play happens in under the last two minutes then you would have a 10 second run off. 5 yard penalty from the spott of the foul unless it was behind the LOS. Then it is enforced from the previous spot. The player that fumbles must recover the ball, if not the ball is spotted at the spot of the fumble and the clock will start on the ready.

I think that covers it, anybody else?