The battery died in the home security system and it armed itself early in the morning while I was asleep. I heard my roommate scream “OH SHIT IT’S GOING TO GO OFF!” and incorporated it into my dream, wherein I was trying to disarm the system but all the numbers on the keypad were zeroes.
The roommate ran in and woke me up for my passcode because hers wasn’t working; in my confusion I gave her the combination to my bike lock instead.