Kind of like what others have said... But, I can give first hand blood clot experience from it being in my leg (multiples). Just being there can be extremely painful. I had surgery on my ankle which caused them. I can't even imagine the pain that it would've caused if it traveled, but when I worked as a CNA in a nursing home with some residents who had blood clots--they'd scream if you even attempted to move them.
So I'd bet it wouldn't be pleasant. Given the feeling in my leg was a cross of a non-stop pulled muscle and being stabbed, I'd hate to think of that feeling throughout my body.