Talk:The Crystal Empire - Part 2/@comment-15294178-20140511200229

Large portions of this can be explained away by TV physics, but I did some math on the episode: from where Twilight was standing when she dropped the rock down the spiral staircase, based on the time it took for the sound of the rock hitting the bottom (and assuming the speed of sound and force of gravity are the same as on Earth), the floor was still about 310 metres (1017 ft) below her. It's difficult to tell how far she was down, but an upwards angle when she's at the bottom implies the rock was dropped from halfway, giving us somewhere near 620 m, making it the fourth-tallest structure on Earth.