You can look at this from a multitude of angles:
1. He thought about robbing the store, went to get his rfile, then decided better of it and left.
2. He thought about shooting everyone in store, but decided against it and left.
3. He wanted to scare as many people as possible and thought it was funny.
4. He thought he was making a political statement, actually had an epifany that this was probably a bad idea and left.
5. He was a liberal anti-gun person, who thought he wuld create as much shock and disdain as possible to support the cause.
6. He wanted to start off being a D.C. sniper, bur realized he forgot his ski mask and left.
Glock 17, 19, 20SF, 21C, 22, 26, 27, Glock E-Tool, Glock knife
Quod ego haereticus appellari sequere Jesum.