Help! My Timeline Disappeared!

[RaizelDesign]

I know what I did but I don't know how to undo it.

I was minimizing my timeline, cheerfully hitting the minus key over and over, when I got this error message:

And now, I can't figure out how to fix it. I've tried the plus key (duh) and closing and restarting the application. 

Any help will be much appreciated!

[RaizelDesign · Accepted solution]

Okay, weird. it just picked up on the plus key and all is well. Thank G-d.