Cornerdigging is a bug where you can go halfway through (or all the way through - if the scroll is broken) a block, by going to the corner of it and then back quickly.
Cornerdigging to get further underground
During the website blackout of December 2020, the reboot site had many scroll bugs, making cornerdigging a possible way to beat Dumbcar ladder
This is possibly one of the oldest bugs in Tileworld.