Stampede

Whenever a creature with this trait fails a Willpower test, it automatically moves in a straight line forwards as far as possible, overrunning anything in its path until the source of danger is escaped or crushed under hoof.
Anyone in the way suffers a single hit from the creature’s Natural Weapons (or 1d5+SB Impact damage if it does not have that trait). One stampeding creature automatically causes all other creatures with the same trait within sight to stampede as well.
The stampede lasts until the source of danger is no longer visible or for 1d10 minutes, whichever occurs last.