
I messed with the throttle, trying to get it to come back up, but it wouldn't, so I threw it into neutral and turned it off, then coasted off the road. My sister and her six year old daughter were in the van with me, so it could've been bad if I hadn't reacted so quickly.
Here's what caused it- the linkage that goes to the cruise control unit is broken, and the loose bit of linkage moved around when I had to jump on it like that, and it wedged itself between the throttle body and the top of the engine, holding the throttle open.