https://www.theregister.co.uk/2019/12/25/how_do_you_ascertain_user_acceptability_if_you_keep_killing_off_the_users/

Something for the Weekend, Sir? Brussels sprouts make excellent projectiles, but only if they're boiled and undercooked. This much I discovered from experience as a youngster in the school refectory as we drew towards this festive time of year. Ho ho ho, what japes.

I use the term "refectory" with precision: high ceiling, wood-panelled walls, long tables with benches, starchy odour, cold. There was none of the modern "canteen" about it. A monk would have felt at home there.