Cripple and the hunchback

A cripple and a hunchback walking home late one night,
"let's take a short cut through the grave yard" says the hunchback,
"No way! That place gives me the creeps" says the cripple.
"Pah! I'll see you at home, then" and with that the hunchback sets off across the grave yard, about half way through his nerve is faltering, and just then a goblin leaps out in front of him,
"Where are you off to?"
" h h h home" stammers the hunchback.
"Whatcha got on yer back?"
"A hump"
"Give it here!!" And with those words there is a blinding flash, the goblin is gone, blinking the hunchback realises his hump is gone, he's cured! He runs out the grave yard and heads back to meet his friend the cripple. Catching him up he tells him excitedly about his cure, convincing his friend to chance his arm, the cripple retraces his friends path, about half way sure enough the goblin leaps out,
"Where are you off to?"
"Home"
"Whatcha got on yer back?"
"nothing!"
"Here have a hump"