Go as Oddball from Kelly's Heroes. Leather jacket, helmet, leather flap holster with a Luger inside. And go without shaving for a while.
"...you see, like, all the tanks we come up against are bigger and better than ours, so all we can hope to do is, like, scare 'em away, y'know. This gun is an ordinary 76mm but we add this piece of pipe onto it, and the Krauts think, like, maybe it's a 90mm. We got our own ammunition, it's filled with paint. When we fire it, it makes... pretty pictures, scares the hell outta people! And we have a loudspeaker, when we go into battle we play music, very loud. It kind of... calms us down."
"Look, baby, I'm kinda hung up. I need sixty feet of bridge."
"Why don't you knock it off with them negative waves? Why don't you dig how beautiful it is out here? Why don't you say something righteous and hopeful for a change?"