You know you're old when one of the juniors at your club asks what ringtone you have on your mobile phone and when you tell them it's the A-Team they reply with "Never heard of them, what songs do they play?"
when you climb up an 8ft wall, feel achy once up, do the job at hand then worry about getting down again and causing an injury!!! (had this at work a couple of weeks ago lol)
My old man always says it's when he is watching a concert or a sporting winners' ceremony and gives consideration to the poor few who have to stay behind and clear up.