A little dangerous tennis movie to do with fireballs

A little dangerous playing movie of tennis done by putting a fire on the ball. Every time a fireball strikes a racket or a coat, a trace of flame remains, making it an interesting thing in visual terms. However, if you actually do it, you may hurt the coat or you may bear the burning yourself so please never manage it.

Details are as below.
Although appearance is flashy, the damage of the racket seems to be quite large.
YouTube - Fireball Tennis


There are something you want to put on fire for tennis balls, others are also trying fire tennis.

Fire tennis in the dark without lights. I can not play because I can not see the ball if it is normal, but it seems that I can hit the ball somehow because the ball itself is burning.
YouTube - Fireball Tennis