Maya - Particle Instances, Meteors

Again this was created using one meteor and using particle instances to create more. Expressions used are as follows.

particleShape1.customsize = rand(0.2,1.5);

particleShape1.customRotate = <<rand (360),rand (360),rand (360)>>;

particleShape1.customNumber = rand (1,-1);

Then add as 'Runtime Before Dynamics Expression'

particleShape1.customRotate += particleShape1.customNumber*5;