One morning at about 1:00 AM, I got a phone call from my little sister's cell. She lived a time zone to the east, so it was 2:00 AM there. It woke me up, and I immediately sensed that something was wrong. I picked up the phone and groggily said "hello?" when I heard a muffled woman's voice--possibly my sister's--say, "Please, help me." She sounded terrified and desperate.
I immediately thought I was having a "Taken" moment. My sister is being kidnapped/tortured, and it was all she could do to call me for help! Should I hang up and dial 911? Should I yell into the phone? Should I keep listening and try to pick up some kind of relevant information? I really wished I had one of those fancy phone recording devices that the Taken guy had right then. I opted to keep listening, and as I did, I occasionally heard muffled yelling and screaming, much to my horror. Her phone must have been hidden away pretty well.
Then something strange happened: I heard what was clearly my sister's voice, also muffled, but completely calm. I didn't hear what she said, but it was a very casual, conversational tone. Then I noticed for the first time that there was also scary music along with the yelling and stuff in the background.
tl;dr My sister butt-dialed me in the middle of a goddamn horror flick at 2 in the morning.
I hung up, called back, and gave her hell for it.