This video from the USA says about itself:
Squirrel High Fives And “Air Hugs”
11 January 2017
How to take your relationship with squirrels to another level by training them to stand upright and play catch and share air hugs and high fives – well actually “high-fours”! Training the newest generation of Backyard Squirrels is harder than it looks, but with peanuts and patience and a few drinks (for me) it can be done. One even raised the bar by jumping for joy!