[JugglingReferee]

CANADIAN RULINGS:

Originally Posted by Mark Dexter

A has the first series, scores a TD and, since it's the 3rd OT period, goes for a successful 2 point conversion.

B goes 3-and-out, but the coaches somehow forget that it's OT and send in the FG unit instead of going for it on 4th down.

Valid in Canadian ball.

Originally Posted by bob jenkins

1) Team A scores a FG while on offense, and then a safety while on defense.

2) Team A scores a TD and extra point. Team B commits a turnover, and during the play Team A recovers tha ball and runs into the end-zone (without the momentum exception) for a safety.

Valid in Canadian ball.

Originally Posted by Mark Dexter

I'm not sure what the rules are for an INT during B's series in OT. A small part in the back of my brain says the play should be whistled dead.

The defense can end the play by scoring.

Originally Posted by Nevadaref

Nope. The play finishes just the same as any other play. If this is the first team on offense in that OT, then the game is over if the defense scores. If the defensive team has already been on offense and has scored, then their player would be smart to simply fall down or take a knee.

Same as Canadian ball.

However, if the defense fumbles before the play is over the offense can get the ball back and maybe even score on the play.

Same.

What I don't know for sure is what happens if the offensive team gets the ball back, but does NOT score on the play. Is their possession over or do they get to continue? I think that they are allowed to continue the offensive series.

Their possession is over. They do not get a new series.