Cyborg?
I found out that 1 in 10 pensioners are cyborgs (because of pacemakers etc...), so I asked my grandad 'Are you a cyborg?' And he replied 'How can you tell!?'
Limerick
The once was a tall man called jack,
He climbed up the top of a stack,
He fell on some lead,
Cracked open his head,
And was buried in his big shack.