Shelley Johnson looks like the panicked face emoji. Eyes as round as a full moon, sclera visible. Eyebrows aiming to introduce themselves to her hairline. A mouth as open as an ill-fated opera singer.

Tom Klep is the building and grounds manager for UPMC Park and Erie Insurance Arena, where he operates the Zamboni. A Zamboni resurfaces an ice rink by shaving, cleaning, washing and applying hot ...