Every time he said "article 5" I thought he looked scared. But not in an "I'm scared of nuclear war" way, more of an "oh fuck I feel the shit running down my leg" kind of way, you know?
Also funny, in the same breath, he mentioned both Poland and Belarus as Putin's next targets.
It's from the NATO treaty, "Article 5 provides that if a NATO Ally is the victim of an armed attack, each and every other member of the Alliance will consider this act of violence as an armed attack against all members and will take the actions it deems necessary to assist the Ally attacked."