Watch the Dive Bomb online guitar lesson by Chris Buono from 60 Electric Guitar Techniques You MUST Know
Dumping the bar to the body is what a dive bomb is all about. Usually done with open strings, dive bombs are an effective way to add wow factor to a lick or riff without needing to worry about what key you're in. It's pure energy and it should always be done with gusto. Anything less is just a crime.
Looking for inspiration? Going back to Eddie Van Halen and "Eruption" once again and just listen to the hell he unleashes after the infamous tapping cadenza. It's a massive open low E string dive bomb that starts it off.