The wall of death

Why Mr Egbert has a lion that loves a drive on the wall of death is a mystery

http://en.wikipedia.org/wiki/Wall_of_death

Mr Egbert taking his 5 year old lion out for a ride on the wall of death at Mitchum fair, Jan 1935. http://www.viewimages.com/Search.aspx?mid=2659974&epmid=3&partner=Google