Actually just 4... lots of practice doing these types of things. It's always fun breaking things though!

not too hard... would love to let you know. I have to speedlight flashes on a wireless trigger/ controller, and the camera all set up on 3 separate stands, the camera on a tripod, the flashes on light stands. you can either use a 2nd person to shoot the gun (harder to time) or use a cable release to trigger the camera/flash at the proper time (better chance for good timing) and a few eggs as targets on a pole pounded into the ground... then it's all timing after that.
Camera settings ISO 1600, 1/8000th, f8 ; flashes at 1/32 power, high speed sync at about 1 meter away (so they don't get covered in egg guts)