I suppose hypothermia, frostbite, impalement (if pointy), and crushing (if there were enough of it) could also be ways that one could meet their demise via dry ice.
Also blunt force trauma, choking, or a fatal dose of ennui through observing the dissipation of a once solid object into insubstantiality and analogizing it to the ephemeral nature of the mark one leaves on the world.