Proxies can't actually measure velocity

[Jacbo1]

Functions like owner_velocity_length(), owner_velocity_world_up(), etc. don't actually measure the correct velocity. They only go up to like 5 when jumping where it should be going up to 200. I think they might be using the wrong entity or something and it doesn't even work with root owner checked. It also changes when I go between crouching and standing with root owner so it's definitely using the wrong entity.

[DBotThePony]

Because they are measured so from outside of predicted context, which is a source engine quirk to begin with.