How many different scenarios can you get for a burn over drill...?
I would have thought just one..... fire's coming, appliance can't escape before fire arrives, take cover, do the appropriate things on the appliance / radio / with pumps / hoses etc, once 'passed' check on crews, appliance & surrounds. Can't see much else to it.
And as Alex says, chuck a burn over drill in the middle of something else you are doing..... my brigade does that a number of times over spring / summer training... it's good practice, and doesn't take long! Nothing required from HQ to get it done.....
Pip