I have seen a few anchors but this one is quite unusual...

What is the most unusual anchor you have seen?

http://www.anchorright.com/productCa...hor.php?id=int

"Features:
# Hoop on the rear of the anchor ensures that the SARCA rolls over in
most situations, allowing the toe to be in its best possible position
to penetrate the ocean floor and reducing dragging as the fluke digs
in
# No more chain tangled around and between the flukes preventing the
anchor from taking hold. SARCA’s unique tangle-resistant design
improves anchor efficiency and safety
# Unique design also creates a pumping action which sinks the anchor
deeper. Teamed with the SARCA’s 360° pivoting action, this makes the
SARCA resistant to wind and tide changes
# Incorporates an automatic reset trip re-release that offers you the
highest rate of recovery from rocks. When anchoring in and around
bommies, reef or coral the SARCA has less chance of getting stuck and
will create less damage to the environment
# Light in weight, easy to handle and contains no lead in the design
to contaminate the marine environment
# Certified as high holding power anchors by the Victorian Marine
Board and MSA witnessed by Loylds of London to comply with the USL
code; a testament to their efficiency
# Available in top-quality 315 stainless steel or hot-dip galvanized
mild steel

Easy to use on all bottom types:
Mud or sand
1. Come directly above the SARCA and apply light and stead pressure.
2. The SARCA’s special slots allow a break in suction which, couple
with a long shank, means the SARCA is easy to free.

Rock or Reef
1. Simply motor directly above and pull all the slack rope. Then
release approximately ½ metre of rope and tie off.
2. Motor your boat forward over the anchor. This lifts the rear
resulting in a high recovering rate.
3. The moment the anchor releases, the stainless steel D-shackle
slides to the front of the anchors’ shank and resets."