When this happens the nucleus has to get rid of the excess mass or particles.

When we change shape, we take our excess mass and put it in another plane of existence.

It means we can take any kind of heavy equipment with us by squeezing out all the excess mass.

Stripped of every gram of excess mass, the streakship had been left with more grace than armor.

The excess mass not needed in the transformation was the dying organic matter they had found.

On the return trip to Cybertron, it became necessary to jettison excess mass.

That same three kilograms of excess mass I couldn't account for at Deimos.

When morphing small animals, one's excess mass is extruded into zero-space.

A moment later, there was a blinding flash of white light as she released her excess mass as energy.

We can't use overdrive in system, and we're carrying a lot of excess mass.