Car Throttle Stuck problems of the 1998 Volvo S70

Throttle stuck full open while driving!!! the car needed to be turned off to stop the engine from revving to maximum rpm. This is the second time this happened in one year.

Over maximum "30" second period, vehicle bucked, then interior lights came on and began blinking, then throttle stuck in "full" position, then brakes failed completely while black smoke emerged from under hood and wheel wells, then flames visible from from grill over hood of car, then vehicle finally brought to stop using emergency brakes at which time flames were two-three feet high from grill and wheel well(s) area of car - exited immediately - car total loss . . . . . Have since been made aware of "another" '98 S70 fire with very similar sequence of failure events and result - Volvo contacted and claims evidence of animal nest under hood (assistance denied) - cinncinati insurance (my carrier) hired & conducted professional/independent fire investigation with results pending . . . . . . Have full set of photos - general comment: if there were an elderly person, diabled person or child strapped in childseat riding in vehicle, unable to react/move so quickly, results could have been catastrophic!!!!!.