Oh yes, it happens, around here it is closets and almost always it is nosy Sparkle! That girl has to check inside EVERYTHING! She has also learned to open the new kitchen cupboards (floor level, not up on the counter!) but can't seem to get herself out again. So she sits and bangs it until we pay attention and go find her.

It is annoying and funny more than anything. You are lucky she didn't need the litter box in all that time!