I don't want to talk about teaching your horse to spook in place, at that, I am not an expert. Rather, I want to discuss the behaviors you should engage in as a rider to ensure your horse jumps, snorts and acts squirrley at every opportunity.
I recently did many of these things to turn my ho-hum Morgan who had never spooked into a spooking machine after her first bobble. I am sure if you engage in these activities, I can guarentee you that your horse will spook.
1. Worry. Worry that everything might spook your horse.
2. Have zero confidence in your horse. The less confidence you have (and have in your horse) the more likely she is to spook.
3. Hold your breath. When we are relaxed we breathe normally, sometimes we even sing a song or laugh. Holding your breath is an awesome sign of tension and your horse will react to it.
4. Over react. Did it scare you? Make sure you let your horse know! You are, after all, a predator, so if you are scared-your horse will be do.
5. Go fetal. We curl up when we are afraid. Sitting up straight, with a deep seat is a sign of confidence, so make sure to fall forward on your horse, it might even help you come off if he is super scared.
If you decide that you don't want your horse to spook, then just relax, be confident, breath and sit back. There are many other things to help, but this is a good place to start.