It was all very exciting! We were getting dry after his bath, and as usual Nathaniel was wiggling away and standing himself up using anything that stays still for long enough. Suddenly Ian cried "He's standing!", and sure enough, there was Nathaniel standing up totally unaided and looking mighty proud of himself! He stood there long enough for me to say "Are you not holding him?....wow!.....well done!!".
Then he did it again.
Then Ian ran downstairs to get the camera and Nathaniel pushed himself up off my knees and did it again.
Then the camera arrived and he stopped.
So you'll just have to believe us when we say it happened.