What would San Francisco be like without its iconic hills? Good question. Local performance artist and dancer Karen Cheng and filmmaker Ross Ching created a video that seemingly twists reality so that the sky-high S.F. streets appear flat. The result? Trippy, mind-bending shots that — while impressive — may also give you a case of vertigo (but it's worth it, we swear). If only they could make this happen for real. Take a look at the cool GIFs from the video, and get ready to see S.F. like you never have before: flat as a pancake.