Yup....Those "Light Orab's" that haunt photographs on occasion can be downright frustrating...even scary. The one I have trouble with is the Gay little "Amp" that goes around blowing all the fuses randomly. They always catch you off-guard. So much so, that as soon as a fuse blows, you don't believe it happened so you install another fuse and watch to be sure it blows too. This is very common troubleshooting procedure and is why I always carry 2 of each size of fuse.
Sometimes I insert a screwdriver into a randomly selected device or assembly just to practice this unique skill and be reassured that the procedure still works.
Occasionally I practice it using an "ice-pick" style trouble shooting light. I make sure the shaft of the "pick" part is resting on a grounded part of the assembly. This is to "steady" the insertion of the "pick" enough to ensure it only touches the hot post !
Bruce