97 F150/4x4/auto.

I had the brakes bled by a good shop last year because of this same symptoms.
The Pedal feels Mushy.
The Truck won't 'panic' stop! Foot to the Floor...

This morning at the stop near the house, the Brake Pedal 'pushed' back at my foot. Vibrating back.
No gravel on the pavement.

I wonder if there's some 'secret' places that need to be bled?