Power Output

I do 99% Sam Yo rides.
Today, I joined a ride where multiple riders started at the same time.
Right out of the gates I started at 1, but one rider had 6 almost immediately.
He jumped to 14 almost within 60seconds of riding, and was out of reach really quick,
Within minutes, he was double plus every rider in the group.
I know how the outputs work, resistance plus cadence,
but there is no way, this person was max'ed out way above the ride parameters.
And to start at 6 when the rest of us had 1's in the opening of the ride makes no sense to me.
Can anyone explain to me how that works ??