Funniest thing my gf has ever said

Funniest thing my gf has ever said

We were at a a red light and i noticed a woman in the car behind me making a lot of arm and hand motions. No one was in the car with her (probably on bluetooth).

Me: Hey babe look at this woman behind us. What is she doing? She's just flailing her arms around but there isn't any one with her.

GF: Maybe she's deaf and she's singing to herself.