How to let someone know you're into them, without terrible pickup lines.

These are all totally normal things to do. They may or may not be from cartoons.
  1. Go "awoooooooga" when they walk by.
  2. Have your eyes come about a foot out of their sockets in their direction, and float in the air a little bit.
  3. Throw in a "hummina hummina" for good measure.