A joke in 50 words

Two friends were climbing; one fell from the top.
The other tried to contact him with his radio equipment:
"Hello, Are you ok?"
'I'm fine! "
The friend sighed with relief, and asks:
"Do you have any fracture?”
"Noooo!."
“Great! Back up I´ll wait for you."
"I can´t, I'm still falling!"

 
Try it.