Speaking of portions, the maddest portion of food (outside the US anyway) is the serving of proper chip shop chips, where a "small" is enough carbs for a family of four and a large could probably power a train for week.
I occasionally get some from the local chippy after imbibing some libations at the hostelry, a couple times (when in a state of extreme enjollification) I have ordered the large, no other items, and attempted to eat them. Both times, despite the heroic powers gifted to me via alcohol I have managed about three quarters of them before entering a bloated and torpid state suffused with regret and spent most of the sleepless night wondering if this is what pregnancy must feel like.
I dread to think what I am going to do to myself when the pubs reopen properly...