Well, I was playing with one of the admins today and was bug testing with him. Here are some of the glitches that we did.
1) Weapon: 2012
Power: 70
Angle: 40.5
Glitch: Crashes other player's shockwave/flash player
Other: This is probably the hardest one. You have to have the angle/power correct but shoot right in front of a person.
2) Weapon: Double Splitter
Power: 10
Angle: 90
Glitch: Switches other players inventory to basic weapons
Other: You have to be right in front of the other player, as close as you can get without overlapping.
3) Weapon: Magic Shower
Power: 100(Max)
Angle: 90
Glitch: 540 points in 1 shot
Other: You have to be on top of your enemy and also put your shield on.