josh darnbrough , from mossley , near ashton , only discovered the prank the following day after looking in a mirror - and said his partner went ` absolutely bonkers ' when she saw it .
josh darnbrough awoke after a party to find that his friend had tattooed his back .
josh -lrb- centre -rrb- was tattooed by his friend rob gaskell , 24 , inked the words ` if found face down call an ambulance ' on his back , using a diy kit .