Carl Confronts Tom at the House, Explained：one of those things

Carl resents that Ronnie did not organise the food or the arrangements, and says it was "his responsibility." When others defend Ronnie as too shocked to cope, Carl only mocks him harder. The scene suggests the hostility predates the death.

It is a crude British idiom meaning to stop stalling and start doing something. Carl uses it to accuse Ronnie of failing to make arrangements. It is the kind of thing you say to a lazy friend, not at a funeral.

Carl says he "cared for her in my own way," and insists "she knew how I felt." Tom does not accept it and keeps pressing, asking "Did she?" The scene leaves it deliberately unresolved — we see the family's contempt for Carl's answer, not the full truth.

After Tom and Carl nearly come to blows, Gerri gently tells them not to feel obliged to stay, and Tom says "We best get going." They apologise for the scene on the way out. Leaving early is the only way to stop the argument escalating.

Ronnie is grieving and admits "I don't know what to do." Carl's "very fragile" is sarcastic, meant to sting Tom rather than describe Ronnie honestly. The film leaves Ronnie quiet and depleted, so the mockery looks cruel rather than fair.