Stepover
Stepover
Type of Action: Part of a Move Action
If a creature is 2 size categories or larger than a nearby creature, it can effectively ignore that creature when moving (though moving still provokes attacks of opportunity as normal). By doing so, the larger creature can step over the smaller creature, ending its move either on or past the smaller creature. Neither creature is considered to be squeezing as a result of a stepover, because the relative size differences are so great.
If the larger creature chooses to end its movement while sharing one or more squares with smaller creatures, those creatures may remain in those spaces, and provide easy Internal Flanking for their allies. The smaller creatures may also move out of the occupied space (provoking as per normal movement rules) if they prefer, using normal movement (or they can tumble out using Acrobatics, to attempt to avoid taking attacks of opportunity). All internal spaces of a creature are considered to be threatened squares of that creature.
If the larger creature is subjected to forced movement, it is possible to make the larger creature stepover legally sized (smaller) creatures as part of that movement.
Note, however, that smaller creatures cannot enter the square of larger creatures with normal movement, but must instead use the Might skill (if they want to stop inside one of the spaces the larger creature occupies), or Overrun (Combat Maneuver) (if they want to move to an unoccupied space on the other size of the larger creature).