[Bog]

Ophir: any chance you tried the t/o rolling? Something tells me that if those guys had been hustling to meet a flow time, they might have kept it rolling around the turn.

Here's another thought about being the PVT pilot who sounds the alarm that something is wrong. Even if you're right, will the flight crew admit to it after aborting a takeoff? I'd have to imagine that it'd be awfully tempting to claim you had a nutso passenger causing a disturbance in the back, which resulted in an aborted takeoff, then to claim you aborted a takeoff in an erroneous situation thanks to the bravery of a private pilot.

Basically, even if you're right, be prepared to be held in a cold cell for at least a little while.