User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-28303251-20140221070746/@comment-184612-20140221072625

After they take a bit of damage (maybe 1/4th or 1/6th of their health?), they will faint and it'll play the creepy music and it'll come back up.

They have increased strength, speed, and additional moves.