a term used primarily within the entertainment industry. a term used by riggers that means move out of the way i've droped something when said from a great hight.
shout heads whenver you've droped anything that will hit someone working below you (even if you think there's no one below you)
Term used to signify that you are really focused on your work, often used as an excuse to shoo away inquiring co-workers. Literally means you have your head down permanently affixed to your computer screen.