"And THAT" Carrie told John "Is exactly what could happen if you started sucking on helium
from that balloon! Now give me that before you do something stupid that can't be
reversed!"
She grabbed the balloon from him.
John looked sad.
"I'm sorry John," Carrie said in a gentle voice "but we're in Toon Town - a place where
anything could happen. I just don't want you to get hurt."
"Okay." Said John.
"Now if I give you this balloon back," Carrie asked John "can I trust you not to suck out the
helium?"
"Yes Carrie," he said "You can trust me."
"Good." she said, and gave him back his balloon.
What happens now?