If you mean the physics objects, here is the code that pushes "you" from "my"
VECTOR push_force;
var push_strength;
vec_diff(push_force, my.x, you.x);
vec_normalize(push_force, push_strength);
phent_addvelcentral(you, vector(push_force.x * -0.003 * time_step, push_force.y * -0.003 * time_step, push_force.z * -0.003 * time_step));
But I don't know, how to make multiple pushes...

So I guess, just make simple explosion with applying this force to it. I guess that help.