Firealarm
Last Wednesday we had to leave the classroom early. The reason for this was a fire alarm.
It was a “nice” experience because nobody panicked and there was no hectic rush. Within a few minutes the whole class was outside. After a while (no clue how long it took) we were allowed back into the building. Someone told us that the fire alarm was set off by butter popcorn which were too long in the microwave 
After that a friend told me that this is the reason why it is not allowed to make popcorn in government buildings…
