I also am going to have a smoke.

In my generation (4-5 years older than you kids) I've noticed a lot of overestimation. For example, many Dutch people exaggerate how well they speak foreign languages. Last year I was in Berlin with a couple of friends and we encountered a plaque or whatever and some of us wondered what it said. One of us said he'd translate it and boasted about it. I knew/know just enough German to read it most of the time and know the most common pitfalls for Dutch speakers. What he was telling us was almost the exact opposite of what the plaque actually said. Since the guy in question is a wiseass in general I remind him of this episode every now and then.