The polish speedrun map Impossible, but OnlySprint!
IP: play.hpknetwork.xyz
Map ID: A07B
OnlySprint is a Map Maker gamemode where the only rule is that you cannot stop sprinting. Doesn't really do much to other normal records of this map, but just makes it more annoying to attempt as you're not allowed to hit into any wall nor any chance of stopping midair (to kill speed or other means). Another difference with this map on HPK Network is that the timer starts immediately after you restart instead of starting at the green wool as usual on Polish servers. The ending is a bit different as well, as I accidentally put the end plate on the floor of the platform instead of raising it a block up, so you're forced to run instead of jumping straight into it, losing likely 200-300ms of time, so getting a sub 27s is a bit harder there.
In case you're not aware, I've already done a speedrun of this map as part of ub3rl337z4ur's speedrun contest: • Dark Forest 26,502s PB (26,748s IGT)