Back when Anthony Pettis was UFC lightweight champion -- and riding the pine due to injury -- Khabib Nurmagomedov was trolling him on Twitter and making fun of his frequent boo-boos. Well, it appears "The Eagle" is getting a taste of his own medicine, after undergoing knee surgery and then failing to make his scheduled return against Donald Cerrone at UFC 187 due to yet another injury (don't blame AKA). Hopefully, these two can settle their differences somewhere down the road -- if and when they can both stay healthy.