This happens to me all the time. Hand won't obey. Having a major freak out.

Me: *is trying to draw* No...that looks wrong. *erases*
Me: *tries again* No! Stop! *erases*
Me: *tries again* ARRG! *erases*
Me: *tries again* WHY WILL MY FREAKING HAND NOT OBEY?!?! *erases*
Me: *tries again* *eye twitches* *hyperventilates* AAAAAAAHHHHGGGGG!!!! *rips paper to shreds* *slaps hand* I AM YOUR MASTER!!! DO AS I COMMAND!!! *rolls on the ground, tackling my own hand*
Dad: *stands at the doorway to my room* What the heck is our daughter doing? Did we fail in teaching her? O.O
Mom: Naw. She's just having an artist's block.
Me: *snarls like a dog and bites hand*