I used to do a checkerboard pattern on the kitchen tiles at my parents house...
Do you ever lean your head back in a chair and try to figure out how you would walk around on the ceiling if gravity happened to reverse itself (too bad for all those folks outside
Some rooms have interesting ceilings that would be fun to climb on, and sometimes you'd get trapped since there are no windows/doors close enough to the ceiling to escape or climb to the next room from.
Did you know on drop ceilings you can often push them up and be able to climb over walls. That makes locks useless as a pencil can pull a tile up from the top. I found that out in band class when we did stuff...
Two rooms have always confused me with the reversed gravity. My living room has a fan that would kill anyone unlucky enough to get trapped up there (no string to stop it) and the main entrance at my school is so tall that it has no windows or doors within ten feet of the ceiling.
I do the tile stuff, but it is a pain at my house, the tiles aren't in a grid and have 3 shapes/sizes. That means in one direction you can use 2 types of tiles. The other direction you can only use 1 type and have to jump diagnals every other step which slowly pushes you into a wall.
At schools the tiles are set up with the entire hall bordered in black tiles (safe) and through the center white tiles are rows of color spaced with 3 rows between them. You can step on the colored rows or the outermost tiles on the rows centered between the colored ones. Problems come because the spacing is thrown off at doorways which of a funky diamond 45 degrees off from everything else. You can only step on its corners. The main hall is composed of diamonds in which you can step on the corners or ones in line with the corners.
I do the window cracks/dirt as a sort of mario game, jumping mailboxes black pavement (stay on the dashed lines) and tall grass. I did that even before I played mario so I think the creators of it did the same thing.
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