At our club we have quite a few elder pilots (80 plus) so we get our fair share of senior moments. My instructor was all of 75 when he started teaching me, for the first few lessons all I could think about was ""if he has a heart attack now, would I be able to land this plane safely?" - one day he overheard me saying this to another student so in that flight he pretended to have one just to see how I'd react.....
However the most memorable senior moments one of them had was taking off in a PA28 whilst leaving the tank filler cap just perched on top of the opening - fortunately the cap wasn't chained down so didn't batter hell out of the wing, just dropped off of the wing on the take off run with the tank rapidly emptying as the slip stream drew the fuel out....
What made this all the more worse was the fact that sitting beside him was an Instructor who was carrying out a ratings renewal check flight.....
3. Complete brain freeze when approaching airfields trying to work out how to join the overhead.
I just remember my entry point is over the threshold of the runway given as active - so if I need to join overhead for 24 right hand, I make sure I cross the threshold of Runway 24 with it on my right hand side and keep it on my right hand side at all times...... What can become confusing is when you've been told join overhead for 24 Right Hand and are approaching from the south. I was taught that you should cross the 06 threshold first and proceed at the required altitude over the airfield on the dead side until you are over the threshold of 24 and join here, but I've seen many a pilot head directly to the threshold of 06 and either wonder "where do I go know?", or start descending and try to make it in from there without circuiting or, more scary, head for the threshold of 24 direct from the south and spin a quick 180 over that threshold......