Ready for your daily does of over-the-top Suda 51 humor? Then you're going to absolutely love the new Shadows of the Damned trailer. The new gameplay montage is done in typical infomercial style with no shortage of cheese factor, and the title, "Enlarge Your Johnson," makes it quite obvious what sort of infomercial the video is parodying.
In all seriousness though (hah), Johnson is a pretty useful wand-thing to have around. Aside from providing added humor and acting as an excellent sidekick to Garcia, he fulfills a number of tasks. So yes, Johnson is actually a gameplay mechanic in his own right. On top of being able to turn into a flippin' motorcycle, he can also transform into a variety of guns. No, that's not a euphemism.