Run a BA excercise , either smoke filled, or masks "blacked out"..
Run this in a building, making it as lifelike to the real thing... Set it up with dummies, just like a normal simulation.. So the team are on a primary search.. Have a safety officer inside, and when he/she see's fit, walk up, tell a fire fighter to lay down and activate the DSU..
This is really as lifelike as possible.. - Maybe take them a couple feet off a hose/guide line, to simulate them going off the rope/hose and getting lost or having a partial collapse.. - Make it real difficult and make both members down, simlating maybe a roof collapse or flash over.
But, everyone in Picadilly now knows that next BA training is going to be a FF down..