Not quite the same but I once was bored enough to keep trying to see how low power a solar powered calculator could work with.
I held my hand over the solar panel at various lengths until the screen cut out and while doing this I just kept hitting random keys and while lifting my hand up.
One day when I did this I must have hit the one in a million chance. It started rapidly counting up by itself!
I think I only got it to happen once more. I suspect the fluctuating voltage and it trying to do calculations while I was pressing keys was just enough to get some gates latched into the wrong state, somehow.
I held my hand over the solar panel at various lengths until the screen cut out and while doing this I just kept hitting random keys and while lifting my hand up.
One day when I did this I must have hit the one in a million chance. It started rapidly counting up by itself!
I think I only got it to happen once more. I suspect the fluctuating voltage and it trying to do calculations while I was pressing keys was just enough to get some gates latched into the wrong state, somehow.