Just before hitting the guardrail the driver was able to regain control and pull out of the skid.

Lolly, huh? Short for Louise no doubt.

Problems involving graphs first appeared in the mathematical folklore as puzzles (e.g. Königsberg bridge problem). Later, graphs appeared in electrical engineering (Kirchhof's Law), chemistry, psychology and economics before becoming a unified field of study.

Tie a knot in this rope for me, please.