Incomplete illegal forward pass

[Theisey]

(NF) enforcement spot is also the end of the run.

A play that tends to come up every so often at local chapter meetings is one that involves an illegal forward pass thrown by the a runner to stop the clock because he was not going to be able to get out of bounds while time is running out. So he needs to stop the clock in an effort to conserve time.
The discussion centers mainly on not where the enforcement spot will be as that is the easy part, it centers on how the clock will be handled and what to do when time expires before the snap.