I must be dim, ‘cause I don’t think I get this one either. Did the dog have a wee at the snow catman? Is it a live cat covered in snow? What’s the significance of snowless bit of road surface, or the Bolshevik and the levitating dog? Arlo looks outraged, rather than shocked, so my first assumption of a road accident is probably false.
Dammit, this is approaching Cow Tools territory levels of incomprehensibility for me.