어서 날아가다

fly off — or be wiped out

A "-아서/-어서" clause (do this, and as a result) running into 날아가다, literally "fly away". Both readings appear here. Literally: a tube flies along behind the boat, you jump and sail through the air, something sticks on and flies off with it. Figuratively it means gone for good — weak hair falls out, a company misses its audit opinion and is gone, firms get wiped out overnight. Which one you get depends entirely on whether the subject can actually fly.