http://www.youtube.com/watch?v=bvyeA7xHABo
Fuel altered engines are volatile things by their nature - which is why it's one of the most exciting spectacles on the track. You never know what you're going to see,
In this case, you get to see an engine blow up (pay close attention to the 1:12 mark) and flames spew like crazy. As the YouTube description says:
Special thanks to Aaron Siembieda for the GoPro footge of this proof that Fuel Altereds by their very nature are volatile. On Thursday before qualifying for the Good Vibrations Bakersfield March Meet, Sean Belt's nitro-burner proved keeping these nitro-burners in your own lane is much easier than keeping an engine from detonating. Watch these unique angles of this massive engine explosion.
The driver very narrowly kept it out of the wall, too.