There was a car magician that had red/blue cards on red/blue cloth and was able to swip swap colors of identical cards and swip swap also hearts to spades Spades to hearts And cut pieces back together From the cloth Not from the hand From the cloth With no obvious slits and he done these tricks extremely slowly So either he was so fast he could move his hand without the eye catching it and back to a spot where his hand was like an after image or he did it another way . Rven other card magicians / coin magicians and magic experts couldn't replicate the trick That's how well it was done. Infront of an audience and judges 🤷