We’ve seen engines explode on tuned sports cars running on dynos before, but how about a DT466 diesel engine…yes the same kind used in tractorpulling competitions, exploding and flying through the air?
The engines used in tractorpulling run on alcohol or methanol fuel, and generate thousands of horsepower, so when things go wrong, like in this video, the results are simply scary.  
This particular tractor is appropriately named ‘Never Enough’ and at one point its driver simply disappears into the flame generated by the explosion.

Video: Tractorpulling leads to engine explosion

Source: YouTube