If you run well and can pushup lots, you'll be fine.
1. Do NOT fall asleep, or get even droopy eyes at any time.
2. Do NOT stand out from the crowd, just blend in with the rest.
3. Keep feet and knees together, legs squeezed tight from nutsack to ankles, knees slightly bent, and even a sloppy PLF will look close to ok. Might even keep you from breaking something.
Beyond that, have a nice fun easy three-week break from your real job. Ohne Liebe sind wir nichts