That thing reminds me of the old "Ralph Nader Chivvy fix" remember those? In the early '70's there was a big campaign about throttles sticking open on Chivvies because the driver side mount broke. Chivvies had mechanical linkage throttles and not cables, so the engine would lift up and jam the throttle open.
As is usual in such cases, NOBODY seems to be smart enough to just reach up and turn off the key!!!
(!!!OMG!! The gas pedal stuck on my 40HP 283 2bbll!!!! WTF do I dooooo!!!!???? I CAN'T hit the brakes!!! I CAN'T steer with the wheel!!! I CAN'T just stomp down really hard on the big pedal on the floor!!! AND I CAN'T shut off the KEY!!! The SKY is falling!!! The SKY is falling!!!)