I would kick it’s balls beat the crap outta him! and steal his weapons 
I would wrestle it with my bare hands, then kill ten to twenty a day.
If I saw a combine i’d open up a can of sex and put it on my arm-pitt!
Assuming it’s a lone Soldier, and I’m armed with a pistol and knife,
[align=center]Get behind cover,
See what weapon it has,[/align]
[align=left]AR2[/align] [align=center]SMG1[/align] [align=right]SHOTTY[/align]
[align=left]Run. Run so far away.[/align] [align=center]Attempt to knife.[/align] [align=right]Retreat, try to snipe with pistol.[/align]
I’d be prepared to get mercilessly owned for the next seven hours.