Newsroom Paper Fight
I used to work for local ITV News, the lunchtime broadcasts were filmed in the newsroom so you had a nice background of a busy news office with people sat at desks working.

One day 60 seconds before transmission someone started a paper fight, rolled up bits of paper were flying around the newsroom I'm sure a few quickly made paper planes also flew around.

The director was having a fit over the audio channel as the countdown began, 10 seconds to go the paper fight continued, 5 seconds to go it was getting worse, 3 seconds to go the presenter had a paper ball bounce off her head and at 1 second before we were live the last ball hit the ground and everyone turned to their computer and pretended to look busy at their desk.
( Terry Oblong There's nobody here but us chickens on, Fri 12 Jun 2009, 0:58, Reply)