Because 'Murica.

From Bubba's YouTube description:

Here we shoot a 79 ford bronco with 30lbs of tannerite in the drivers seat at 300yds. I had the Camera set up behind the Bronco about 20 yds behind a sheet of lexan bullet proof glass so I could get a close up of the explosion our next adventure we are gonna try 50lbs in an old donated bus let me know what ya think and how can we improve. Thanks for watching.