From Dr. Adam Tanase and his excellent Check the Neck blog:
- Ride roller coasters and bumper cars.
- Headbutt soccer balls.
- “Pop” your own neck/back.
- Participate in backyard wrestling matches.
- When talking on the phone, cradle it against your shoulder.
- Jump on a trampoline after drinking tequila.
- Do all the heavy lifting when helping your friends move.
- Sleep on your stomach.
- Ignore your Chiropractors advice.