In the upper right hand corner of the page that video plays on, there is a little blurb stating that he made a bet that he could hold the rifle like that and shoot it, or something of that nature.
lmao...that reminds me of when i was in the army teaching some privates to shoot the sawed off shot guns .... i told one private 3 times not to hold it like it was daddy's shot gun. he said sergeant w/ all due respect i know how to shoot a shotgun... famous last words. as he knocked his 2 front teeth out. priceless imo