Did that perp really skip over to that truck like a little 8yo girl, or have my eyes just gone bad??
Apparently, it's illegal and considered an explosive.
So, I had to look it up. I am not suggesting anyone do this, but I have not found anything under Indiana law that makes doing something like this, intended only to scare someone off, not injury or kill, a crime.
"A person who knowingly or intentionally deploys a booby trap commits a Level 6 felony."
Ind. Code § 35-47.5-5-10
"'Booby trap' means a device meant to cause death or bodily injury by:
(1) hiding the device; or
(2) activating the device by trip wires, switches, antidisturbance, or other remote means."
Ind. Code § 35-47.5-2-2
Granted, if it ends up causing injury or death, you can count on law enforcement and prosecutors putting you in a position where your subjective intent, what the device was "meant" for, is a pretty important issue.
...and of course, lawsuits.