That image always bothered me. Is he holding a pistol sideways in his left hand?
Why the hell would you stand out in the open and fire your sidearms, when at least 1 (likely 2) planes are shooting at you with 3 machineguns each?
He is dual wielding two different guns, aiming and firing them at different targets...
... while running quickly, turning in an arc, possibly zigzag style.
Does this make much sense?
In reality, fuck no.
In a video game?
Well he is the chosen one.
Also bonus factoid:
The attacking planes appear to be based off of an experimental WW2 era aircraft design the US had for a jet powered, parasite fighter, a small fighter plane carried by basically bombers, that would detach to fend off attacks, and then reattach to be flown home... these drawn ones are seemingly the 'grown up', non parasite versions of a similar style.