I had no idea either, but...
https://en.wikipedia.org/wiki/Bam_Margera
... he's a celebrity due to his appearances on 'Jackass', which is a popular diversion on the radiodiffusion kinematograph.
It was either him or one half of Bam-Bam.
(
RRNot is a miserable sinner,
Thu 5 Sep 2013, 20:53,
archived)