I'm very unlucky so a lot of the time i get hit by missiles. I know you can place tnt crates and potions to block the missiles and i do do that but sometimes the missile hits me even though i placed an item behind when it was close to hitting me. Is there a consistent timing i need to learn or what?

I did a 1 char all areas run and its been verified, but its been placed 43rd place even though there's only 41 runs before this and my run is not on the leaderboard