My Girlfriend Vanished at 30,000 Feet ,Then I Smiled

I was bringing my girlfriend home to meet my parents for the holidays. After the plane took off, I went to use the restroom.

When I came back, she was gone from the seat beside me.

I flagged down a flight attendant. She told me I'd boarded alone.

I asked the other passengers. They all said there had never been anyone sitting next to me.

But I had boarded that plane with my girlfriend. I knew I had.

She'd just peeled an orange for me, told me it would be waiting when I got back from the restroom.

How could she simply vanish?