Yup. I showed up at my local airport once a little more than an hour before my flight - bus schedule changed, bus driver wasn't just heeding the speed limit, he was setting new records for undercutting it

... short line to check in, but I need a wheelchair to get to the gate. Somebody brought the chair - but then nobody showed up to take me to the gate.
Finally, with about twenty minutes until flight time, a Delta manager took over. We headed through the 'fast' line - and sure enough, I set off the metal detector! Now, a redcap had finally arrived, but I still had to be screened. The TSA person started to explain what she was going to do, and I very nicely said, "I don't care, you just do it, my flight leaves in seventeen minutes!".
We still had to navigate two elevators, a lonnnnnnng walkway, and the airside terminal - and naturally my flight was at the farthest gate. We get to the terminal, it's empty, except I can see two women standing at the jetway for my gate. I start waving wildly and yelling (discreetly, of course

), "I'm coming". One asked if I was [me]. They'd held the plane! I didn't ask, but apparently because me being late to the gate wasn't my fault?