He loses his grip, and finally falls, tearing off the rope as well, and lands in the liquid nuclear waste.
His body enlarges beyond belief, from six feet high, to one hundred fifty feet high.
The problem is, there is no cure. He decides there is not enough room for him in Cracker 46's base, so he starts digging upwards through the mantle and crust, and finally emerges onto the surface. In the time it took him to do so, the superheated vaporized rock circling the world has cooled and condensed, so the world is cooling off.
Thankfully, Nyan Cat was there to cure him! Everyone came back from the dead and had a happy Nyan Party at the Nyanch! :D
However, Earth's core becomes unstable due to all of the chaos, and explodes in an enormous nuclear explosion which completely shatters the planet. The debris is moving so fast, that it can't come back together. There is now a new asteroid belt between Venus and Mars. Both Nyan Cat and Tac Nayn were vaporized in the explosion. However, Cracker46 survives the explosion and the vacuum of space due to being mutated by the radiation from the blast, on top of the mutations caused by the earlier nuclear waste accident.