Pins that are laying on the pin deck or in the gutter.
Pins that fall over but remain on the lane or in the channel that must be removed before the next shot.
Pins that are knocked down but remain on the lane after the pins have been reset.
Fallen pins which remain on the lane or in the gutter. They must be removed before the next delivery.
Pins that remain on the lane or in the gutter after being knocked down. They are removed in ten-pin, but left in place in both candlepin and duckpin bowling.