Surely that's impossible! Adrenaline junkie uses just his FEET to hang upside down off a cliff edge... but is all as it seems?

                    

 Luiz Fernando Candeia was pictured dangling off a ledge at Pedra Da Tartaruga in Brazil, without any safety gear or protection. Luiz demonstrated unbelievable core strength to maintain the nail-biting position no strings attached, a nerve-wracking 300ft above the sea.