Suddenly trun around while sitting on a looping minecart and prees F5

Please look the video on google drive,I can't describe it

1.make a loop minecart like the video

2.prees F5 three times and it will studden trun around if you facing a correct direction

 

https://drive.google.com/open?id=1zZxdhXozibAJBxtxTEFz2cGTeAeNRS5O