(Season 4, episode iOMG.)

When Carly tries to get Sam and Brad together, she has Freddie make up a "Two-Headed Frog" thing to get Sam and Brad in the same room with no one else.

They were in this thing called a "Lock In" where they get locked in school to finish their asingments (sorry I cant spell that right.) If they were locked up the how did freddie get the kids out there to see the two-headed frog?