Don't be so sure >letting 10 of them at a time in the man trap before opening the other door The man trap I've used in a data center was a cylinder that allowed

Don't be so sure >letting 10 of them at a time in the man trap before opening the other door The man trap I've used in a data center was a cylinder that allowed only one person in. Think the new security machine in the airport where it goes back and forth around you, EXCEPT it's about a third of the area. Really really small.