Many people, especially in the jiu jitsu community noticed developments in the ground game portion of the Judo Olympics 2012 in London. There were a number of chokes and armbars that ended fights, and I even recall seeing an oma plata attempted by an Austrian male judoka.
My favourite however, was a reverse triangle in the female under 52kg division.
When you look at how the situation went, it just goes to show that your ground tactics should be something else than laying face down on the ground after a failed throw attempt. The lady doing the submission gets it in easily, goes to her side to adjust it and comes back on top to finish it by holding her opponent's leg.
Here is what it looked like as a sequence
"LOCKING THE TRIANGLE"
"FINISHING THE TRIANGLE"