"Helloo? SOLDIER! Rhyss! What is your location!?" Martin yelled in the phone impatiently.
Some lunatic was holding sooume speech over the intercoms and Martin couldn't hear Rhyss over the cryptic rambling as well as people running around shouting orders. Things got better after someone Martin guessed to be the guy in charge commanded calm.
But now everyone'd be in alert. Bad.
"I'm short on time Rhyss, and I can't hear you so you'll have to get your own transport.
I'll be at the airport, gate 7. Come armed and ready to hunt something you've never hunted before."

Martin hung up, his cover was at risk here and Rhyss sounded suspicious.
He might not believe Martin, or decide not to care for authority today.
So Martin intentionally left him with a line like "something you've never hunted" to catch his interest.
Even if Rhyss didn't believe one word, he'd probably show up just to see what that thing would be.

"To the airport, lets go!" The soldiers looked, not moving towards the truck.
They seemed to be rattled by the voice and the commotion, quite a few seemed frightened.
"Look! You heard the monster speak just now. He means to kill everyone. Now if you want that to happen I suggest you stay here and sit on your ass. But if you want to save your lives, your families. Then get in the truck, we've got bad guys to stop."