Three friends of mine and I went to GamesCom this year and of course played BRINK! When we were first in line, they told us, we would have to wait one more round because there would be some special guests coming...
Then when we went inside those special guests were there and someone told us, that one of them is a parkour professional, he had three buddies with him and then we actually played agianst them, but we were beaten pretty fast and bad, because the Bethesda guys helped them a lot, obviously they couldn't let them lose in a game, where one of them helped with... xD

Only after we finished and were out again, I remembered the words that one guy said to us in the beginning and I just understood right then, that it was Ilabaca! But it was too late for taking a picture...