Héhé...
When you animate an arm going up you dont have to make speed lines on every arm -_- Dude, if you want to make a fast arm, you just take 3 Keyframes,
1 Arm just down
2 Arm halfway with speed lines only on the bottom side
3 arm horizontal.
And thats it, you are learning the people wrong things here. And if you suck at backgrounds then dont make a tutorial about it.