Revealing mistake: Right after Marv loses his shoes on the tar-covered stairs, he goes back outside to go in through the window. When he's walking in the snow with bare feet, you can see that he is actually wearing little flesh-colored rubber booties that look like feet. Then later, when he is getting into the police car at the end, you see a short shot of his feet when he's almost in, and you can see he has black boots back on. (01:22:30)