I took my son for a game of golf. On the second hole there was a tree about 40 feet high half-day down the fairway. I told my son "When I was your age, I could hit a golf ball over the to pop of this tree from the tee off. My son tried 4 times, and every time the ball hit the tree and fell to the ground.
He said "Dad, I don't believe that you could clear this tree from the tee off. No-one can do it"
I said "When I was your age, the tree was only 2 feet high"