The trick behind this unbelievable Mary Poppins Returns scene will blow you away

There is a moment from the amazing new Mary Poppins movie that had many people scratching their head as to just how they did it.

In the Mary Poppins Returns scene, actress Emily Blunt – who plays Mary in the film – seems to magically disappear into a bathtub filled with bubbles while singing Can You Imagine That to the Banks children.

It happens in just split second, but wow, it is stunning!

• READ MORE: The first song from the new Mary Poppins movie has been unveiled and it is so sweet

While it would be easily assumed that the fantastic stunt was pulled off with the help of CGI, Disney has proved that that wasn’t the case at all.

• READ MORE: Emily Blunt is 'practically perfect' in first trailer for new Mary Poppins movie

In fact, it turns out it was all real thanks to a secret slide being built into the bathtub, where a brave Emily slips backwards down.

The mystery was unveiled in a video that surfaced on Twitter and has since gone viral.

Our minds are blown!