So apparently this crashes Box2D after a few seconds in MP.

[Qwertygiy]

Otherwise, it appears to function normally. It makes lots of random circles around the specified player's name that vanish in 1/10th of a second after being created.

[lua]
local n = "Qwertygiy"
for q = 1, 100 do
sleep(0.1)
for w = 1, 3 do
local ball = create("Circle")
ball.Parent = game.World
ball.Name = "Sparkle"
ball.Collidable = false
ball.Radius = math.random(1, 3)
ball.Color = Color(math.random(0, 255), math.random(0, 255), math.random(0, 255))
ball.Position = game.World:getChild(n).Body.Position + Vec2D(0, 3) + Vec2D(math.random(-2.01, 2.01), math.random(-2.01, 2.01))
local s = create("Script")
s.Source = [[sleep(0.1) script.Parent:remove()]]
s.Parent = ball
end
end
[/lua]

[Invader]

jaycub
pls fix it

[Jacob__mybb_import1]

This bug has been around for at least a year and a half... It shows up randomly in SP every few months, and I'm still not sure if it's a Box2D bug or my fault.

Adding each circle to the world after you set the properties and add a script might fix it, since it's less work for Box2D that way.