Don't have nightmares anymore, but as a child I remember one particular nightmare where my entire immediate family (except myself) was devoured by a giant-mouthed pruple monster. Inside (dream went into 3rd person perspective at this point) they were jailed by a spider in a top hat.
I teamed up with my grandpa and, unholstering a pair of Nerf guns we bought from Wal-mart, we took the beastie down and saved my family.
Nightmare ended well as we were reunited.
tl;dr Family eaten. Jailed by gentleman spider. Saved them with a Nerf fun and gramps.