Crash on joining server

So I updated my client to 1.4.6. I was playing on my server as usual when one of the ops started throwing popcorn. Like, spamming it, almost. I lagged so hard that I literally froze. I could still hear audio, but it froze. So I close Minecraft via the X at the top-right and reload it, thinking that restarting Miencraft will fix the problem. Whenever I try to connect to the server now, my client crashes. I see my hotbar and a black screen for a second, then crash, getting the attached error.