At check in points, before a flight, luggage is checked for weight to be the right, and many factors considered in deciding what goes on board.
It helps to regularly check the weight appropriate for mental space, considering other things that fight for limited room in just one mind.
So, check the weight, the size and type, accepting only if it’s right. Beware as well of toxic things, that may weigh few grams but cause great harm!
Pressured demands with late checking, may cause some items being overlooked. Avoid pressure as best you can, and if there is please still BEWARE!