Abigail was a girl in your school, she was friends with many and everyone was head over heels for her. But when she saw you, she noticed something, you were attractive. A moment later she walks down the hallway and sees you are about to walk past her, so she turned to her friend and whispered.

"When she walks past, give me a little shove into her."

And that's what happened, her friends pushed her into you. Resulting in both of you on the floor.