You can use a method of moving a unit in very short intervals a short distance.
For example, every 0.05 seconds, move the unit a distance of 50 towards a certain points. From speed = distance/time, you can calculate this would give a total speed of 1000.
It's not the best way to do it, as when done incorrectly, it can cause a great deal of lag. There are lag free methods of doing this as there are knock-back like abilities on this website that move units smoothly with speeds greatly beyond 522.
EDIT: Also, if it's a dummy, you could also just use the "move unit instantly" action to make it appear where you want instantly.