Transformers: Revenge of the Fallen, that's right they have dropped the 2, is currently filming. And there are a couple of videos online of filming taking place.

The first video shows a scene being filmed with a rather unscary looking robot. I'm sure once it's finished it will be suitably terrifying.

The video from the set of Transformers: Revenge of the Fallen, is below from Transformers 2 unofficial movie blog, through Latino Review. It shows a less than friendly robot attacking someone in a car. It's only a puppet at this stage, but hey that's what they pay actors for right. The other video is on the site, but only shows Megan Fox and Ramon Rodriguez limbering up. I guess it really is hard work looking hot.