MSNBC's Krystal Ball couldn't foresee being called a "dumbass" by a prankster posing as an eyewitness to today's MH17 flight disaster, even after the guest—claiming to be stationed at the U.S. embassy in Kiev—claimed the plane was shot down by "a blast of wind from Howard Stern's ass."

Ball let that response go right on by—even though she quoted part of it in her followup question, which earned a "you're a real dumbass, aren't you?" reply.

[MSNBC]