When I saw the WR holder for all minigames OOB I saw that there is a skip to skip the mine cart section, but don't know how to do it. can you tell me how to do it?

The skip that is used is called hyperspeed swing. Basically, you set your FPS to 30, grab on to a swing, hold jump, and then spam the click of the hand you grabbed with. For example, if you grabbed with your left hand, you would spam left click. If you click too much though, it will send you flying out of bounds.

Thx @CookiesUnite