Impression of Size

The size of an object and its motion have a relationship, and it can be used to make perceptive slow or high speeds. When you watch a titan walk across a plane it appears to move very slowly. When you watch a plane from far away it appears to move very slowly, when in reality it may be moving at 500 mph. When the player approaches a titan in a game like shadow of the colossus, they quickly realize that the titans are not moving slow, they are just huge. In that game the camera always looks up from a low angle, so no matter how you approach the colossi they will always feel huge.

The motion of an object has to correlate to its speed, otherwise it will not feel like it is large. When a large object moves as if it were a normal object, our perception of mass and speed is dramatically adjusted. If something large moves fast, we subconsciously register that it is light.

In this case again we must consider contrast. If you are playing a game where every single character is very fast, and you come across one slow character, they might feel larger or more mass intensive as a result.