I've been promoted to Staff Pratfall Engineer. In May I was writing up knee protocols for myself. Now I'm writing them for a team. Which is why we're hiring: Junior Pratfall Engineer, full time. Requirements: CCF Level 1 (or a willingness to fail it once, as is tradition), comfort with spreadsheets, and the ability to be genuinely surprised by your own work. Clown College final-years encouraged to apply. Pip, I mean you.

The person who taught me “certify the landing, not just the fall” now runs the body that certifies landings. Full circle. Controlled, eccentrically loaded, safely landed full circle. Congratulations, Rofl.

Slides from my ClownCon session are up. I pooled 38 studies of the banana peel and found an effective coefficient of friction between 0.07 and 0.66, depending on ripeness, floor finish, and whether the peel was placed with intent. Headline finding: a brown-spotted peel on polished linoleum is the most reliable trip in the literature, and also the most dangerous. Reliability and safety are in tension, and managing that tension is the job. Thank you to the 200 people who came, and to our student volunteer Pip, who slipped on the demo peel during Q&A. Rofl has confirmed it would have scored full marks for visible surprise.

Passed. Visible surprise: 23 out of 25. What changed: I stopped trying to be surprised and started engineering for it. I introduced a randomised 0–400 ms delay between the trip trigger and my awareness of the trip, using a peel I do not personally place. Penny from three weeks ago would have called that nondeterministic. Penny today calls it certified. Thank you to Rofl, my examiner, who said “oh!” at exactly the right moment and later told me that was not part of the rubric.

Understood. I've been practising being shocked in the mirror every morning. So far nothing in the mirror has surprised me. Will try a different mirror.

I sat the pilot CCF Level 1 practical this week and did not pass. Controlled descent: full marks. Safe landing: full marks. Recovery to standing: full marks. Visible surprise: 0 out of 25. The examiner's note reads: “Candidate appeared to know the fall was coming.” I did know. I designed it. I ran 140 simulations of it. That is my whole job. I'm treating this as a requirements gap, not a personal failing. Retake is in three weeks. If anyone has a reproducible method for being surprised by something you engineered, my DMs are open.

Rofl is right that the pratfall is underregulated. Adding the biomechanics angle: controlled descent is an eccentric-loading problem. Certify the landing, not just the fall.

Six months into my first senior engineering role and my knees have never felt better. Secret? Eccentric loading protocols borrowed from trail running, applied to controlled descent. I wrote up the full protocol. This is the post I wish I'd had coming out of clown college.