I can't figure out his magic card trick!?

Question

So my friend has a pair of aces faced down that are stacked together. Then he puts a card in between the pair of aces faced down. He then shakes the 3 cards really fast and the middle card suddenly faces up. How does he do this?!

Answer 1

Its hard to guess without seeing it

But one sleight of hand that makes a card face up is to hold the card between your thumb and 2 finger, as you shake, the first finger turn the card around

This is use in card change

was the card on the deck? maybe he just double lift