I'll be doing some preliminary numbers, but the number jockeying is going to be done by the math team so we can find out how much dry ice we can use safely.
Whats unfortunate is that no one will know how much careful planning went into this. Ah well. Were also thinking of putting cameras where the dry ice is going to be dropped, and broadcast it live on the buildings TV's, so you can see it happening. Our building has TV's in the hallways and rooms, all controlled from a single point; so this is perfect.