We’re not sure exactly what’s going on here. There’s no way these racers can think that this is a good idea–but maybe they do. After all, this is the internet where anything can happen.
But at least now we all know what happens when you spray a can of nitrous into the intake of a supercharged Chevy Cobalt. That much unregulated nitrous without fuel to match will almost certainly lead to a catastrophically lean condition in the engine. It doesn’t lead to the big fireball you might expect, but that much smoke coming from the exhaust is never a good sign.