Thanks! Yeah, it has a very startling "pop". It's an extremely light doll, so the launch is Very fast! I Used the red lights out of the jumping spider prop for the eyes.
I also made a pop up skeleton with both his hands up in the air and it has over the shoulder restraints on, like he is on an amusement park ride. I used one of those little screamers that you would put in the fridge/cabinet that goes off when they open the door, I wired it to the launch button and attached the speaker inside the rib cage, so when it launches, it screams lol... It definitely gets people to jump, the sudden "pop" that goes along with the launch gets them every time.