We're not sure it it's the pregnancy with Kim Kardashian, or the fact that Jay Z is teaming up with Justin Timberlake for a tour, but Kanye had yet, another melt-down on stage at his latest show in London. After screaming into the mic for over a minute, Kanye threw the mic down onstage and the mic hit a concert-goer in the arm.

Watch: Kanye Screams & Throws Mic

What in the world is going on with him? According to sources, Kanye was upset over the production and sound quality of the show.

We think maybe Kanye needs a break -- and quite possibly a valium, ASAP!