quiescentire: Ultron's wildly inaccurate science (MCU)
http://quiescentire.tumblr.com/post/118 165125509/the-kinematics-aou-meta-you-di dnt-know-you-needed
As a scientist, here’s my advice to Ultron. If you want to create an extinction-level impact event, you need to generate a force on the scale of teratons, not megatons.