my and my friends were in the chemistry room, playing with the Bunsen burners, when we decided to melt paper clips and erasers to our pencils. about 5 minutes later we had about 10 completely black pencils that were burned in a result of this stupidity, and we still use those pencils to this day
I Spilled water on the fire alarm pull, setting it off... Today.
I was accused of illegaly pulling it, however showed them the water, and was pardoned. However, Everyone knew I had done it, considering it occured in a class switch.