was it an accident?

I can't remember if the plot ever implied that it was done to Rhonda or not, was it just an accident? Or could somebody have tried to kill Rhonda?

What was her reason for killing everyone? I can only assume that she was jealous of the other girls body's, which is why she killed them, however, she was killing off her only source of income, which was a dumb thing to do, surely it would have been better for her to fleece them rather than kill them,

Was she in a part ownership? I suppose trying to get rid of the other owner by making them believe it was going to fail financially would have made her motive a bit better, this would have involved at worst killing it's clients or just trying to drive them away some how.

I haven't seen it in a while so I can't remember why she did it, but if my memory serves me correctly it was just because she was burned bad.

There comes a time to put away childhood things. But some things just won't stay put!