Movement:
* Stand: If you're talking about the action of going from a standing position to a somersault, the opposite would be simply standing.
* Sit: If you're thinking about the position after a somersault, the opposite might be sitting.
* Crawl: This could be an opposite in a sense of moving slowly and deliberately as opposed to the dynamic movement of a somersault.
Direction:
* Backwards: While not strictly the opposite, "backwards" can be considered the opposite direction of a forward somersault.
Rotation:
* Straight: This is opposite in the sense of not rotating at all, but it doesn't have the same dynamic feeling.
Overall, the best opposite for "somersault" depends on the specific context and what you're trying to convey.