NFL Football Rule Riddles

NFL Rules are very important. But do you know them? Can you get these NFL Rules Riddles Correct? Number 5 will stump you.
I want to thank PRETJAH and CaptainWoody from mma.tv for their spirited debate and commentary regarding these rules.
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SPECIAL THANKS TO PRETJAH FROM MMA.TV WHO CONVINCED ME SCENARIO 5 IS A TD