I heard the hronblasters setup yesterday also. While amusing for the first blast I must admit its fekking annoying and not even funny after the first one lol.
Ill pass on the train horns and air blasters lol.
The electric air horns that are on the market are kinda interesting.
Although this air horn here which I find totally amusing I would put a tank and compressor somewhere for this one. It sounds like a firengine horn and this would accomplish the mission... GTFOutta the way!!! lol