Used by the routines at TAKE_OR_LEAVE, STILL_DEADLY, JUMP_L16_D8, COLLECTABLE, PUSHABLE, SINKING_BLOCK, LIFT, BOBBER, DEADLY_PACER_U, DEADLY_PACER_V, PENTAGRAM_PIECE, SPIDER, QUEST_ITEM, WELL, BUCKET, ROAMER, SKY_WALKER, CRUMBLING_BLOCK, CONVEYOR_PLUS_U, CONVEYOR_MINUS_U, CONVEYOR_PLUS_V and CONVEYOR_MINUS_V.

The offset of most of the things that move by themselves -- the collectables, the quest items, the well, the bucket and more -- and, through JUMP_L16_D8, the whole update routine of several still graphics.