Used by the routine at BUMPED.

Jumped to from BUMPED when the move tried for the object being updated -- the mover: its record at WORK_RECORD, its number in THIS_RECORD and a working copy of it from IY+$64 -- would overlap a record that is not a door: the other, at IX, its number in FOUND_RECORD. The kind bytes (+12) of the two decide, in this order.

A mover with bit 4 of its kind byte hurts what it touches: the troll and the bouncing balls (SPRITE7E88). If the other is the knight he loses 10 LIFE, except on a room's first pass (bit 2 of GAME_FLAGS). If the other is not a still thing (+16), it is knocked -- bit 4 of its +14 and the direction $12 make its next update a hop upward -- and the mover vanishes where it is (bit 5 of its +16). Against a still thing the tests go on.

When the knight walks into something whose kind byte has bit 4, he loses 10 LIFE, the other vanishes, and his move carries on as if it had not been there.

Bit 7 of the kind byte marks a fighter: the knight and nearly every creature. A fighter other than the knight that walks into him takes 1 LIFE; the knight walking into a fighter loses 1 LIFE himself, unless his sword is out (bit 1 of GAME_FLAGS, the striking half of the fight animation, KNIGHT_CONTROLS). Then a fighter that can be killed (bit 6: the guards, the ghosts and the troll) has one of its strikes taken: the counter FIND_OBSTACLE gave it, one of the six STRIKES_LEFT, each 4 when the room was entered. At none left, a guard (behaviour 6, 9 or 10) is left lying as its helmet (SPRITEA4B8), a thing that can be picked up; anything else vanishes. That never happened in the build's sessions. Staged in the simulator -- the counters set to 1, the guard of room 29 put in front of the knight, and B and Y held -- the guard became the helmet.

After the fighters: a creature of behaviour 13 (the ghost, SPRITE5B30) takes any thing that can be picked up that it runs into: the thing vanishes, and its entry in the object table is moved to room $FE, out of the game (SET_THING_ROOM). A wraith (behaviour 11) that a thing of kind 6 or 10 runs into vanishes with it, both taken out of the game; that too never ran in the sessions, and was staged in room 28 by dropping the kind-6 thing onto the wraith. Anything that runs into a kind-7 object -- the floor of the pits in rooms 9 and 12 -- vanishes, and if it is the knight, LIFE goes to 0. Everything else goes on to MEET_DECOY.