No you cannot. Nor can you airgun. You do get a walkthrough when the SO is doing their course of fire and after, its just a group thing and the squad doesn't fart around for ten minutes.
On the flipside, how often to you get to shout of a van?
To the topic, I am surprised. If its an issue, the SO could say don't do that. i don't see where its a DQ type offense.