Trippy Trelawney
Sybill Trelawney mostly kept to herself. She had been harbouring a secret crush on one of her fellow Professors for quite some time now, but didn't dare tell anyone of it. They made fun of her enough as it is. So when Severus Snape left her tower one night, she decided to follow him and perhaps tell him of her love. His hair really wasn't greasy, you know, just really shiny.
When Trelawney heard an odd noise that sounded like a scuffle she ran to the rescue, only to find that there was no one there. Odd. Then she caught a glimpse of what appeared to be the end of a long white beard belonging to Albus Dumbledore on approximately the 784024.345th day since his last trim, and with approximately 10092 split ends, disappearing around a corner. What really unnerved her was that he was cackling gleefully as he half-ran half-skipped in pursuit of what must be her dream lover.
Trelawney raced after the rapidly disappearing Headmaster, finally catching up to him and bringing him to the ground in a superbly aimed flying tackle. Leaving him to fix himself up, with a polite note advising him to get a beardcut soon, she ran off again after Snape.
Arriving outside, Trelawney saw Snape walk over and come to a halt seemingly without a reason. She pursued him to where he was standing; staring transfixed at the Astronomy Tower window as a shape came soaring out of it. He seemed unable to move.
"I foresaw this," Trelawney lied.