I was self launching in fairly strong gusty winds using a second safety leash attached to an old rusty dumptruck that was on the beach
It was an old kite I had not used for ages and the lines needed some adjusting
The kite fell from the sky and powered up just before it hit the ground
I thought I would be ok because I was securely attached to a dumptruck [it wasn't going anywhere]
I braced myself as the kite powered up
I was JOLTED in the air,then PING the safety leash snapped
I landed 15m down the beach and releashed the kite
NEVER use a safety leash to tie off to self launch in strong winds
I was surprised at how easy it snapped
Use a proper rated sling or rope that has a loop spliced in both ends with a rated D shakel or carabina
And attach it to something strong
Eg coconut tree,fence post,4WD,large timber boat,rusty dumptruck
Don,t attach it to a large log on the beach as my mate it once
His kite went cruising down the beach draggin the log attached to it as he was walking back to hook up
He had to run after it



And be sure you have pulled the depower strap