These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Stephen Fry sums up everything he's just read about his great aunt's entire family - "That fucking word Auschwitz". Their photographs fade to black on screen and he reads out how old the children were when they died in 1944.
Ainsley Harriot finds slaves in his family tree, a great-great-great-grandmother among them. He then discovers his great-great-grandfather was a baptized white child, was given money by his father to purchase eight slaves at four years old. Another Precision F-Strike moment - after digesting, Ainsley breathes "Fucking hell".
Patrick Stewart learning about why his childhood could sometimes be so stressful- his father was a Shell-Shocked Veteran (he, of course, insists that it should be referred to as PTSD), which led to his father becoming occasionally violent. Neither he nor his older brother had known this at the time.