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From Pathfinder Impossible Magic, which isn't enabled.

Surprising Leap

FEAT 8
Activity 2 actions

Your eidolon jumps into the air to attack a foe. Your eidolon makes a Leap, High Jump, or Long Jump and attempts one melee Strike at any point during that jump. Immediately after the Strike, your eidolon falls to the ground if they're in the air, even if they haven't reached the maximum distance of their jump. If the distance your eidolon falls is no more than the height of their jump, your eidolon takes no damage and lands upright.

When attempting a High Jump or Long Jump during a Surprising Leap, determine the jump distance using Long Jump's rules, and change your eidolon's maximum distance to double their Speed.

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