Standard procedure. Nothing special, happens every week or so these days.
Recap of Audio after explosion:
Crew: close close close (hatch/covers presumably)
Crew: come on pull back pull back (to driver)
Radio (Two): IED - push through push through
Crew: ah stop (to driver)
Radio (Two): evade please - can you evade?
Radio (other): should be alright
Crew: we're behind it, those behind it too right?
Radio (Two): good, we're pushing through to Donau, gather at Donau. Two End.
"Crew" is always the same person. "Other" is either the crew of the hit vehicle, or the one behind it from the context.