I went to the doctor today.
I couldn't eat any food because I had an ulcer in my mouth. The doctor prescribed medicines for me, to be eaten after food, 3 times a day
OR
What's the name of the rockstar who invented mouth ulcer gel?
Jon Bonjela!
Just aswell you have taxi driving to fall back on!! 
STC should do Stand up...in a Rollercoaster! 
SB here's 1 I dug up especially for you :
I visited an old, abandoned fairground yesterday...
My whole family advised me not to.
"Don't go near the rollercoaster", said my mum.
"Why?" I asked.
"Remember... the story of how it is haunted by Runaway Tom... a ghost that is said to tie his victims to the track and have the rollercoaster run over them."
"Don't go near the pirate ship," said my sister.
"Why?"
"Because it is haunted by Cut Throat Greybeard... a ghost who will hang you and slice you..."
"And don't go into the hall of mirrors," warned my dad.
"Why, who is in there?" I asked.
"No one, you're just ugly...