The Old Switch-er-oo

switch·er·oo [swich-uh-roo, swich-uh-roo]
noun, plural switch·er·oos. Slang.
an unexpected or sudden change or reversal in attitude, character, position, action, etc.

Raine closed the heavy book. "Well, they got unexpected right."

"... Now what?" Zayn put his head down on the table in front of them.

"We find the son of a bitch who did this and make him get us back in our own bodies."