Joseph took out the perfect life form with his wits. No stand. Hamon was useless as well. There was only one thing that could possibly be done.
Reading that part for the first time was amazing. After all the buildup with Lisa Lisa over how Jonathan and his son both dies early, heroic deaths and how Joseph was probably going to follow the same. And so the guy nosedives into a lavapit, because the only chance to defeat the enemy is to send him to the stratosphere.
Yet Joseph laughs death in the face, survives, and lives to be a very old man who fathers an illegitimate child when other men would be playing bingo and shitting their pants in a retirement home.