Code typing animation: a line of code types and its string becomes the headline. A line of code being typed, and then the string inside it becomes the headline. Two shots on one clock. The first is an editor window pushed from 0.91× to 4.24× over two and a half seconds — not an ease, a table, one knot per frame, read off the sub-pixel centroids of the window's own chrome dots and the black body's edges so the scale and the position cannot drift apart. It sits almost still for the first two thirds of a second while the comment is typed at 17.5 characters a second, then pushes hard into the quoted argument until the title bar has left the top of the frame. Then a hard cut, and the argument is alone on black at 108px, drifting up-left out of an exponential settle. It swaps monospace for the display face one letter at a time, left to right, with the hot colour trailing the boundary: 36 letters a second at the start and 16 at the end, because a hand slows into the last letter and a linear sweep lands it a sixth of a second early. The boundary is one letter wide on every frame — no letter is ever caught half way, which is what makes it read as a substitution rather than a cross-fade.