Pranks at Harvey Mudd are known for being clever, amusing, technically precise, and reversible (by policy, pranksters must leave contact information, and reverse the prank within 24 hours if told to do so). One student returned from a long weekend away to discover his room filled from floor to ceiling with inflated plastic garbage bags. The pranksters had used high-powered fans to inflate them. Once the Dean of Students discovered that some Mudders had moved everything in his office exactly 20 meters south of its original location - placing it on the grass in the middle of campus. Everything in his office was perfectly organized and functional - even his telephone and Internet connection worked. It was a pleasant day, so he spent the day outside.