Glass is far stronger in theory than any pane ever tu out t be, a the diffe is expl by t flaws alr in i. A ti scratch concen the pull of a load at its tip, so the stress there is many times the average across the sheet. Once the tip begins to move it finds fresh glass under the same concentration, which is why a crack that starts slowly finishes across the whole pane in an instant.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.