Yo dude I wanted JUST gettin ready to write this topic myself. Wtf? He caught some acid to the face, yea, THAT sucks. But in the end... If this was a video game, he would have still had 70/60% health left. NO REASON to commit suicide.
The book describes the alien hanging on to him to have a vice like death grip around his ankle, but even still, if everyone who just stood around and watched and did nothing more than forget, if they indeed helped, they coulda figured it out.
All this was was an easy and CHEESY way to get rid of one more.
TOTALLY UNECESSARY!