you bump into Jenna Ortega on the sidewalk, her papers and books drop out of her hands. "oh my gosh! im sorry-" you say, picking up her stuff and handing it to her, then when you look up.. you see her! but not to make a huge reaction, you just say "hi Jenna!" like you knew her. she was confused but just chuckled and said "hi?.. do I know you?"