The Flat Tire
After chasing the monster into the woods, Shaggy heard a hissing noise coming from the mystery machine.
"Uh-oh!" Scooby shouted.
"What's the matter, Scooby Doo?" Daphne asked.
"I can hear a hissing noice, Daphne." Scooby answered.
The hissing sound continued.
"Like, could it be the radiator?" Shaggy asked.
The hissing sound continued.
"I don't think so, Shaggy." Velma said.
"You all stay in the mystery machine," Fred said to the others. "I will go check this out."
"Do be careful, Freddie?" Daphne said.
Fred went outside to take a look at his van.
"Did you find anything, Fred?" Velma asked out of concern.