Former UFC welterweight champion Georges St-Pierre showed that his knees are getting stronger after surgery, taking part in the ever-growing “Ice Bucket Challenge” for ALS recently.

GSP, who tore his ACL earlier this year and had surgery, remains away from MMA and the UFC since announcing his self-imposed “retirement.”

Unlike many who do the challenge, St-Pierre also made sure to point out the important part – donating. In accepting, he sent out a challenge of his own to Chuck Norris, Jean-Claude Van Damme and Eugenie Bouchard.

Check out GSP’s ice-filled challenge below: