I've been installing some new furniture in my study, and generally tidying up and clearing stuff out. I found this joke nail, probably originating from a Christmas cracker. I must have kept it in case it came in useful one day. And I suppose it did, because this is my Halloween photo.
The photo made me laugh then I thought I'd better read the explanation just to make sure it was a trick nail! Glad it was and you didn't need the first aid kit!