Oregon: The DC supply is safe to play around with. High enough power will kick, but 100VDC @ 1A won't do more than leave a red mark and maybe a small blister if you're unlucky enough to get a good shot with wet skin. Even 110VAC only tingles across the fingers.
No reason to be afraid of working with it, just respect it. Quality work boots with a layer of rubber will help a lot (as compared to a pair of old runners), but as long as your hand doesn't hit both the pos and neg lines at the same time it won't smack you. If the rubber on the boots isn't enough, toss a rubber mat on the work area to isolate it (then the only real threat is an AC short on the supply or shorting the DC supply through yourself and feeling it's kiss).
Power supplies are fun
Coffee before Conciousness
Why do people worry more if you argue with your voices than if you just talk with them? What about if you lose those arguements?
Slowly going crazy at work... they found a way to make the voices work too.