This really surprised me that nothing was said.
On a recent flight to Las Vegas from San Jose, two women got up as the flight was taxiing to the gate to use the bathroom, and the flight attendant told them both to sit down over the intercom.
One stayed in the bathroom and the same flight attendant said that based on US Fed regulations, the plane would not be able to proceed to the gate until she returned to her seat.
The flight was less than hour long, so why these two could not hold it for another 5 minutes is beyond me.
...however....some women-(or men) really can't wait 5 more minutes.....
...a lot of elderly folks take diuretics because of heart or high blood pressure problems, and they simply can't wait!