I was thinking, it would take alot of work, but maybe somebody can make dynamite/bomb that you can put on the inside or outside of a car?
Pretty much, just a little smaller so you can place it in like the cab of a pigeon or something, and you would have to be able to detonate it with a key on the keyboard, not from impact.
Not sure if it still works, but someone made one for the H-Series a few years ago. Edit: just tried it out and it still works