There's a sword in that gif?

Yeah, the sound of a puck hitting the back of the US net off a Canadian stick.

Why are all the cars from the 70's and 80's?

Had she been an unattractive man from the US, this would have been seen as more racist than entertaining.

She's got a career making airport announcements or working for the MTA in her future.

It's almost certainly Nike's upcoming Power Laces.