Martin saw the mist getting closer and in it the silhouettes of what he could only assume where SOLDIERs.
That would spoil the fun. The fight was getting to an end but this way they'd both die. Couldn't have that.

"Let's practice medicine" Martin whispered to himself.
Martin ran up to up wind of the duel and placed the smoke generator carefully on a tree branch.
"Ahwooooooooh!" Martin did his best wolf imitation, he could see the silhouettes slow down a little. "That ought the confuse them.
*click*
With a light hum the machine came to life and a crimson mist came pouring out.
With delight Martin watched his creation take flight, blood vapor.
In a few seconds the bloody mist-bank would engulf the two.
Time to take some distance, don't want to get shot, besides I can't see shit now anyways.