How do I create opposite physical force like in pinball?

Woohoo! First post haha.

I wanted to make a simple game with pinball type physics and I was wondering if anyone knew how to make the physical object "pinball" bounce off of something with opposite physical force, like the bouncer things in a pinball machine.

Sorry for the noob question..
thank you!

pinball on collision with bouncer things in a pinball machine
> pinball apply impulse at angle(pinball.x,pinball.y,bouncer things in a pinball machine.x,bouncer things in a pinball machine.y)

pinball on collision with bouncer things in a pinball machine
> pinball apply impulse at angle(pinball.x,pinball.y,bouncer things in a pinball machine.x,bouncer things in a pinball machine.y)

I never thought I could love a little Stain so much right now
Thank you so much! I'll try this out when I get back to my work computer.