trans slipping/??

[jasonroman]

well i might have another problem....
took a ride down the turnpike the other day. bout an hour ride south.
the ride down was smooth.
thought to myself, damn what a nice cruise at 75-80 mph.
maybe 2 hick ups on the way. but no biggie.

on the way home however...as i got back on the pike, i started smelling a burning smell...
no clue what it was or were it came from.
a little while later the smell went away, which was a good thing.

THEN
as im cruising at 70-75 ish. the truck suddenly starts to accelerate on its own. pedel headed south. like if i had cruise on.
but i did nothing to provoke this.
pedal just went south and stuck that way. eventually i braked off it and things turned back to normal.

why would that happen??