Ticking screen

I have gotten a 'Ticking screen' error twice when trying to join a minecraft server.

What I expected to happen was...:
I would join the Minecraft server like normal to play a mini-game

What actually happened was...:
I double-clicked on the server to join it, then minecraft closed and gave me the crash report screen. I re-launched minecraft, as I thought this was a one time thing (like usual), but then it happened again.

Steps to Reproduce:
1. Launch Minecraft.
2. Click 'Multiplayer'
3. Connect to a server