According to a source within WWE, Triple H and Vince McMahon aired a backstage joke the two have on Raw 2 weeks ago.
In case you missed it, when Triple H opened the show with CM Punk, he began talking about how the United States is a free country and people could do whatever they wanted to do. He then went over to Lilian Garcia, who was making a one-time appearance with WWE since she lives in the area, and said "Even Lilian Garcia. If Lilian wants to come back here for one night to the WWE just to horse around, she can do it." After Triple H said that, you can hear Jerry Lawler make a horse sound into the microphone.
I was told that it’s been a long standing joke amongst the "inner circle" of guys in the back to refer to Lilian Garcia as "horse face," and that the reference to her "horsing around" on Raw last week was a subtle way for Triple H to air the joke on TV. I was also told that Lilian has never been aware that the guys in the back refer to her as "horse face," so according to the source Triple H’s remark came off more as cruel than witty.