Death by a time bomb. Funny story, I promise.
So ? here was very tired and wanted a place to sleep. They saw a time bomb in the area that was set to explode in a llittle more than 8 hours. Thinking that they'd have enough time to escape after waking up in the morning, they fell asleep.
When they woke up, it was still dark and the time bomb, which had light-giving numbers, was showing 0:48. They then thought that that was the actual time, and doze off again without a second thought. When they woke up after that the time bomb showed 0:02, and it was actually getting light. ? was still a bit sleepy and wasn't realising what was going on.
It wasn't until the time ticked down to 0:01 that they realised they had been sleeping near a time bomb. Upon realising that, they started running towards the time bomb and tried to deactivate it. Unfortunately they accidentally attacked the wrong wire, causing the time bomb to explode about 25 seconds early. Poor ?.