Rule No. 1 : Keep your hands up.
It was a both a cheap and dirty move, but unfortunately, it is one that Ibragim will undoubtedly get away with. However, his reputation will certainly take permanent damage and going forward, it seems highly unlikely that any future opponent will ever touch gloves with him again. It may have been one of the quickest knock outs in MMA history but it was certainly, the cheapest. Ibragim, take your win, go home, and hang your head in shame.