You must ask nanny, or the butler, to help you with step 2.
We were discussing how cats always fall on their feet, moved on to the well known anti-gravity device involving one cat and one jammy (or buttered) slice of bread, and somehow ended up here with very jammy fingers.
Mercy edit: This comic likely makes little sense to those unacquainted with the concept of the conservation of angular momentum. In fact, this comic likely makes little sense.
2. Cut the bread to make a triangle with two 45-degree angles.
3. Spread jam liberally on one side only.
4. Hold jam-side-up, about 1m [39 in.] above the floor...
5. ...and release.
6. Observe. We have demonstrated Momentum of Angular Conserve.