[TOMT] episode from animated show CBBC early-mid 2010s
I was sick when I was little and remember watching some show that was weird at the time, I remember it was some animation and quite short episode of an old man talking to a little boy, then they switch souls and the kid feels sad about it as it weren't his choice, then the old man says something like "no complaining little one", then I remember it just cutting to the old man/kid walking down some stairs, and it abruptly ended as far as I can remember. Pretty weird episode.