Talked to my JB buddies about this, apparently the order of operations isn't entirely correct. This is what they relayed to me:
- Crazy dude has phone issue but is calmed and everything returns to normal.
- Later, one of the pilots needs to take a piss. Everything is calm, normal-normal.
- Pilot leaves cockpit for standard piss break arranged with one FA going into cockpit, etc.
- Crazy dude sees cockpit door open and bum rushes everyone.