The PTL should light cigarettes for you.

[Vitatroll]

It reacts weirdly. You can block it with stuff like artifacts, lockers, etc. but only until you 'update' the PTL by changing it's values. Once anything on the PTL is changed the laser will melt almost anything. Really though, walls shouldn't be stopping a pw laser -- must be that fancy space asbestos.

I guess it could be 'fixed' if it was set to automatically update after a set period.