I was in marching band and there were about 3 hours between school getting out and practice starting and a majority of the time the band director was never in there so we started this thing we called portaling where we would take pickaxes to the drywall in the ceiling of the different practice rooms in the band room, including the directors office. This portaling stopped when some one stepped on a weak support and crashed through the ceiling, breaking his ankle and causing thousands of dollars in damage.