A penguin on a leaf

This is a phrase used to express extreme happiness or joy. It is mainly used within friendship and relationship situations. It is used because of the happiness it gives you, as if you are in a different place, like a penguin would be if it were on a leaf.

Person 1: "Will you go out with me?"
Person 2: "Yes!"
Person 1: "OMG! I feel like a penguin on a leaf!"