Yes, The Tingler. Oh, it did make me laugh. All this recent talk about the chestbursting aliens made me look them up and they are indeed horrible. By contrast, the poor Tingler, with its little non-functioning legs is a bit of a hoot...
https://www.youtube.com/watch?v=26fUY8gnIQc
It ends up with the poor paralytic insect "running" loose in a cinema. Apparently when it was first shown they doctored some of the seats so as to make electrical impulses tickle random bums. I fantasised about a little old lady who occupied one of those seats and instead of screaming, she wet herself - and was electrocuted.