I know some of us noticed some mass shifting in the previous movie (I didn't notice any in the 2nd one) so I came up with a theory of how certain Transformers like Frenzy could mass shift. I'm trying to put this as easy-to-read as possible for some of those here who don't know much about what I'm talking about. Has anyone heard of a theoretical Von-Nuemann machine? A popular example of this would be nanotechnology. Something thats considered a Von-Nuemann machine can self replicate. What if Transformers are made up of nanobots just like humans are made up of cells? But what if certain Transformers are specialized so that they can mass shift? Frenzy's head was able to turn into a cellphone, what if he had the ability to gain/lose nanobots to increase his size, but only up to a certain point? That would explain how his head could shrink, he simply killed off a few nanobots that made up his head to transform. And when he would transform back he can simply regenerate the same parts he lost. Reedman in ROTF is made up of nanobots, I guess spies are specialized like this. A Transformer that can mass shift would be the ultimate infiltraitor. So here's the point I'm trying to make: Certain Transformers are specialized to mass-shift by simply multiplying/Losing the nanobots they are made up of.