Achilles lock

Executing the straight Achilles lock following an inside trip involves several key steps:

1. Initiate by making the opponent step to enable an inside hook with your leg.
2. As the opponent begins to fall, immediately transfer their ankle to your armpit and secure it, using the gi if available.
3. Consider the Achilles lock similar to a guillotine but applied to the ankle. The lock targets the base of the Achilles tendon, with your wrist bone, specifically the distal end of the radius, applying the pressure.
4. Slide your wrist along the opponent's foot until you reach the base of the Achilles to ensure proper placement.
5. Control the opponent's free leg and pivot on your knee to bring your other knee up between their legs as you sit back.
6. Fall to your side, not directly back, to prevent the opponent from sitting up on you.
7. As you sit back, bring your leg over the opponent's body, which is referred to as reaping the leg or position one.
8. Ensure your other leg is tucked underneath the opponent's free leg to protect against counterattacks.
9. To apply the lock, rotate your thumb outward so the bone of your wrist points up into the Achilles, keeping your elbow in and shoulder back.
10. Apply the submission by twisting, pushing up with your wrist, and pulling your shoulder back, creating a rotational force similar to a heel hook.
11. Prevent the opponent's heel from slipping out by pushing your elbow in towards your body.
12. There's no need for excessive arching; the effectiveness comes from the twisting motion and proper positioning.

This technique emphasizes control, precision, and the use of rotational force rather than brute strength to secure the Achilles lock.