Sounds freaky indeed! I'm afraid I don't have any easy explanations. I have had light bulbs do exactly what you are describing. In fact, there is one I can't reach in the back room that does it every time I go in there. It crackles and crunches and pulses, and when I turn off the light, it still glows for a bit. This often indicates a bad ballast. The drill is also not that unusual. I used to deliver/build furniture and we had a drill with a shoddy switch that would sometimes turn on its own. The clothes shaking violently is puzzling. That could only happen from a force acting on them. Just keep in mind that if you rule out psychological tricks and what not, that still doesn't mean the only explanation left is a ghost. A ghost is just about the least plausible explanation we could think of. It is actually more likely that government black ops are testing out a new "drive people crazy" operation. I don't think that's what happened, just saying it would still be more likely than a ghost. As Tim Mitchum says, every mystery ever solved has turned out to be, not magic.