YouTube user jairust makes an AT4 style launcher for model rockets.

[youtube]http://www.youtube.com/watch?v=eTrRjW-j0eM[/youtube]

He then goes one step further and rigs up his 2006 Honda CBR motorcycle to fire rockets :)

[youtube]http://www.youtube.com/watch?v=WLKL7EwTOZo[/youtube]

One of the rockets looks like it flies across the road into oncoming traffic… OOPS!

Reminds me of this picture from a previous post.