Acceleration using a central black hole of galaxy IC 1101 - Space Engine

In this video i’m showing how black hole can be useful for acceleration to very high speed. What i did was setting the ship to orbit the black hole with very high eccentricity. Then as the ship is nearing to the black hole, watch the Physical velocity number. The number is increasing rapidly until the ship kisses the event horizon of the black hole when it’s passing it. Then when the ship is starting to move away from the black hole again, the physical velocity of the ship is , whic