I have had this idea for a long time, and this seems like a great oppertunity to post it.
Make a payload map where the cart is a inflateable motor-boats[www.saturnboats.com] and the map is a very close-combatty forest where there is lots of trees! And it should be raining! It should be a very sneaky map, with spots for snipers wearing Bloke's Bucket Hat or Shooter's Sola Topi or Swagman's Swatter or Liquidator's Lid or Bushman's Boonie or Ol' Snaggletooth! It would be awesome! I have way more ideas, so just ask ahead!