I want to see a bike with a train horn. Cars do it all the time. [1][2][3][4] illegal and highly satisfying

People have used drills+pumps to drive similar hand-held horns at football games so it is doable.

[1] - https://www.youtube.com/watch?v=NOKgg5iCw_c

[2] - https://www.youtube.com/watch?v=enF0m6J7g2w [Tiny car with train horn]

[3] - https://www.youtube.com/watch?v=w31s5NsoOyg

[4] - https://www.youtube.com/watch?v=jLfD1AFsb1I