Character randomly dropping down at the start of the animation?

[iFallOffStuff 52]

So, I created a start of an animation, (a character getting out of bed) and then I saved it and went to bed...

When I carried on working on it the next morning, I played the 4 seconds of animating I had done and my character immediately dropped from the bed straight through my scene??
How can I fix this??

 

EDIT: I fixed it now, turns out I'd accidentally animated him to do that.

Edited June 2, 2016 by iFallOffStuff

[mr_wepee 4]

You most probably have two keyframes set close together accidently. I guess it would be a key frame for the character body. Anyway scroll in on the keyframes and try to find two very close together. The is usually the cause of jerky actions also.