Ignatius' eyes hadn't decieved him. That was indeed the snitch, and he hurtled towards it so fast if he stopped to think he might have feared being thrown off the broom. But Ignatius knew very little about physics. All he knew was that he had to catch the snitch for his own pride more than for Slytherin's victory. And so with every bit of velocity he could muster he raced for the snitch before Sofi could get to it, clenched it in his fist and practically somersaulted while on his broom in the follow through. The adrenaline would probably make him sick later, but for right now he didn't care for he had caught the snitch.