Editing Roof and tunnel hacking (section)

===Personal hazards===

Roofs are dangerous; aside from the obvious risk of toppling over the edge (especially at night, in inclement weather, or after drinking) students could be injured by high-voltage cabling or by [[microwave radiation]] from roof-mounted equipment.<ref>[http://www.osha.gov/SLTC/radiofrequencyradiation/sears.pdf Occupational Safety and Health Administration]</ref> In addition, laboratory buildings often vent hazardous gasses through exhaust stacks on the roof.

Tunnels can be extremely dangerous—superheated steam pipes are not always completely insulated; when they are insulated, it is occasionally with carcinogenic materials like [[asbestos]]. Opening or damaging a steam valve or pipe can be potentially deadly.  Steam contains significantly more [[thermal energy]] than boiling water, and transfers that energy when it condenses on solid objects such as skin.  It is typically provided under high pressure, meaning that comparatively minor pipe damage can fill a tunnel with steam quickly.  In 2008, a [[superheated steam|high-pressure steam]] pipe exploded in the subbasement of Building 66 at MIT, apparently due to a construction defect.  The explosion and ensuing flood caused extensive damage and lethal conditions in the subbasement.<ref name=Steam66>{{cite news|last=Guo|first=Jeff|title=Steam Pipe Explosion Damages Building 66|url=http://tech.mit.edu/V128/N53/steamleak.html|accessdate=3 May 2011|newspaper=The Tech|date=4 November 2008}}</ref>

[[Confined space]]s contain a range of hazards—from toxic gases like [[hydrogen sulfide]] and [[carbon monoxide]], to structures that may flood or entrap an adventurer.  An explorer who enters a tunnel via a [[lock bypass]] method or via an inadvertently-left-open door may find themself trapped if the door locks behind them—quite possibly in an area with no cell phone reception, and no one within earshot.