1998 Chevrolet S10 cruise control problems

While my wife was driving along at approximately. 40 MPH, the truck began to accelerate rapidly. Applying the brakes seemed to have minimal effect as the power of the engine seemed to overpower the braking. At that point she tried to shift the truck into neutral, but put it into reverse instead. This caused the rear wheels to lock, the truck then spun out of control and turned over upon striking the curb. *nlm

I was driving on freeway at 60MPH and set the cruise control on, but the truck continued to accelerate, even after stepping on brake pedal, I was able to control the speed by holding the brake pedal, downuntil I got to my destination, turned the truck off/on and checked to see the acceleration had stopped, the truck stayed on high idle. It seems the gas pedal is stuck.