Batman and Iceman (Retro)

There's something about the original team of X-Men that just works.  I think it's that they each had a simple easily definable power.  I did have one question when it came to Iceman, though.  I loved the visual of him zipping around on his ice slides but I always wondered what happened when those things began to melt.  Did they just start falling apart and come crashing to the ground?  I imagine that would cause a lot of collateral damage!  Perhaps they changed to the consistency of snow before breaking apart, that would avoid most of the problems, I guess.