It's about the youth of Genghis Khan.

It's beautifully shot, with amazing landscapes, a lot of b****y battle scenes, well acted, but the weird thing is, it's structured as a love story. Dialog in Mongolian.

Mongol, 2007, one of the Khans does some neck and back cracking, which comes across as both celebratory and intimidating.

No idea.

Though, if 20% of people have it, I wouldn't call it severe.

Hi Johnny,

Yeah, elbows are one of my favorites…

I have had a few cracks in what you describe as the b**t bone, but I'd say they fall into two distinct categories.

1. Sacral vertebra. I have been able to crack at least one of these by sitting in a chair, then slowly slouching down with b**t hanging off the chair in an arching motion. At a certain point, crack! It's possible this is just a lumbar, however, I normally crack lumbars with a twisting motion rather than an arching motion, and the crack definitely feels like it is in the sacral area.

2. Sacro-Iliac joint. This is just to each side of the sacrum, and very deep. I've gotten both sides to crack by clenching the b**t muscles while rotating the legs/feet outward.

Both are quite distinct from the "normal" hip crack in the acetabulum area (hip socket).

In addition to all that, I routinely crack a part of the hip near the groin. I would describe it as near the origin of the adductor longus. It's distinct from the hip socket and can be cracked before the hip socket "recharges". Oh, and it cracks on both the left and right sides.

Absolutely certain.

Nothing yet.

Some of my knuckles may be oversized, not sure.

Occasionally I'll get too enthusiastic on a distal interphalangeal joint and it will be stiff and sore for a few days.

I don't believe that cracking itself is harmful, but exceeding a certain range of motion might damage ligaments. The articular surfaces are harder to injure, since they never come into contact with one another in a healthy joint, unless you do something truly extreme.

A side note, the surgeon for my wrist just informed me that I have an early stage of Dupuytren's Contracture, which tends to curl the fingers over a period of years or decades. Not caused by cracking, but it may limit what that finger can do in the future.

I am also a lifelong runner, and people are always telling me I'm a likely candidate for arthritis in the knee. From what I've read, though, there's absolutely no evidence that running increases incidence of arthritis of the knee. In fact, there's some evidence that it may be slightly protective.

What is harmful is trauma, the kind you might get in an impact sport. If I do develop arthritis, I figure it will probably be in the wrist that I just broke…

Click isn't the right word in my case. It is definitely a crack.

In third grade, I was punched in the neck, but that was well after my neck started cracking

I started cracking because my older sister used to pay me a quarter ($0.25 USD) to crack her toes.

If it's worth money, it must be a good thing…

I've cracked for pleasure my whole life. I've been a little more obsessed than normal recently, because I broke my left wrist 3 weeks ago, and after surgery, the wrist and most of that hand have been off limits for cracking for a while.

Over the years I've collected 84 different cracks.

• All 28 knuckles of the hand
• Joint where each thumb joins the wrist (trapezium)
• Wrists, elbows, shoulders
• 14 knuckles of the feet
• Ankles, knees, hips
• 8 additional joints in the foot (metatarsals, cuneiformes, cuboids, naviculars)
• Sternum (in 2 locations)
• Jaw (both sides)
• Neck (at least 6 places)
• Thoracic spine (at least 3 places)
• Lower back (at least 7 places)

The sternum never used to crack until it became injured (two separate occasions).

Already this year, I have collected two new cracks in the foot (between 1st cuneiform and navicular, both sides). Not sure why these joints suddenly joined the list after 42 years of relative quiet