A mysterious giant shoebox appeared overnight at the Barclays Center – and its contents left onlookers stunned.

The digital box was positioned outside of the arena ahead of the NCAA Men’s Basketball Tournament with an unexplained countdown.

When the timer reached its conclusion, basketball fans entering the venue were taken aback as the display came alive.

They were faced with an array of elements seemingly unboxing and reaching out before transforming into a sneaker – which then morphed into the new Nissan Kicks SUV.