Minimum height to do a base jump

The mimimum height to do a base jump is 29.9 metres and it was  achieved by Kyrylo Murovanskiy in Kyiv on 11 September 2015. Although the jump was successful, the presice measurements of the tower he had jumped from turned out to be 6 metres lower than it had been expected by him. Was the sportsman born with a silver spoon in the mouse?