He dies horrendously in the wake of the explosion. However, he is laughing the entire time....
A year later, his decayed, radioactive bones fall into a nearby stream, creating a international emergency as the U.N. desperately tries to stop the flow of the stream. Multiple people die of radiation poisoning, and the remainder panic as riots break out across the U.S. It's almost over for the world when someone realizes that all they had to do was reroute the stream into Mexico, which they do.
2 years afterwards, Mexico sends an elite force of supersoldiers into the continental U.S. You fight them off with your handy pitchfork in hand, and the world is saved once more (or maybe just America).
1 year after that, a mysterious virus breaks out, and many people turn into zombies. You fight your way to a warehouse, just to find its just been pulled out of. You meet several friends on your way. Together, you fight your way through hell, to a safe zone, then back through hell when you realize you forgot your teddy bear at the UniMart, then back through to the safe zone.
15 years later, when running from money-hungry lawyers, you trip and fall under a semi.
THE END...
or is it?
No wait, it is. Never mind.
I run up to him and give him a belly rub.