Making a smoke machine forcefully blast out the smoke.

[sanddrag]

But here's the question now. Even if we could get a dewer of LN2 and a solenoid valve and some line and some fittings, would it be practicle and safe to mount it 15-20 feet above the ground in the moving head of a dragon. Or would we mount it closer to ground level and run a flexible line all the way up? ($$) Also, would it freeze all the flowers if it blew back on them? (yes this is for the tournament of roses)

Can you get LN2 from Airgas that is high pressure or whatever so when you relieve it, it comes blasting out?

Also, the system would have to remain in there, and probably filled too (unless we can install a filling valve) from now all the way until after the end of the parade.