Pushing on a model that you are standing on causes it to move very fast

[Johnnyfireball123]

• Detailed description of bug;
  If you push on two parts that are welded together in an L shape, they will move very fast and you will be carried with it.

• Where the bug happens (be specific);
  Anytime you push on two parts welded together in an “L” shape, reproduces 100% of the time.

• When it started happening;
  Unknown, but I just noticed it today.

• Screenshots and videos of the bug;
  robloxapp-20200422-0816401.wmv (1.2 MB) video of the bug
  

  
  the simplest way to reproduce the bug

• Steps to reproduce the issue (be minimal, specific, consistent!);
  Simply take two parts, turn on join surfaces to create a weld between them, and arrange them in the way that the two are arranged in the above picture (L shape).

[wevetments]

This is actually a long standing bug. I remember encountering this in 2013 when I first joined Roblox. This was a very fun bug to play around with back in the days when stamper games were still popular. I believe this has something to do with humanoid physics.