I think I would be tempted to put something on top of it and set it off...I guess I might give it a try when I have some time.
If you don't use the horn just disable it. Probably an easier fix. I can't remember the last time I used mine.
I've done it. It was awesome! It never gets old. Launched a brick like a 100+ feet in the air. Did not have time to measure thugh, I was to busy running for my life.
I have the video of mine but i have not tranferred it to digital yet. I will share it with everyone when I do.