This was an old, live-action joint for sure (not sure if it was a movie or a TV show). I believe it was an ending where there were some kids; I can't remember how many but I believe they ranged from like 9 to teenage. They got into this car but realized that there were these like neon, glowing snakes or worm-like creatures the size of snakes in the car, so they all freak out and get out of the car and they run away into the distance and the credits roll.
I'm not sure if it's an ending though. Heck, there's a chance this could all have been a weird-ass dream.
This was from way back when I was a kid (the 80s) so my memory is super sketchy on this one. Sorry I don't have more details than th