Waking up

Ned was laying on the couch when he woke up.
His roommate John was staring at him.
“What?” said Ned.
“You just appeared out of thin air, man,” said John. “Once second nothing’s there, and then all of the sudden- you appear.”
“Oh,” said Ned. “I’m sorry. I didn’t explain. I always wake up on the couch.”
“No matter where you fall asleep?” asked John
“Yup,” said Ned. “I know why, but it’s hard to explain.”
“Wicked,” said John. “Ever thought about using that to rob a bank?”
“No,” said Ned. “But it did get me out of jail once.”