what if Obi Wan use force speed seen in Qui Gon Jinn and Obi Wan VS Darth Maul

Whilethe gate was close it opened and Obi Wan use force speed to destroy Darth Maul quick but Qui Gon Jinn did not die and either Darth Maul but Obi Wan fallen into the pit where Darth Maul usally died on the area and it is also the end of Obi Wan.