First things first, this looks like a spectacular playground! I would definitely take my kids there if we lived in England. I'm speculating on the location because of the accents. Secondly, I would have gone through that tunnel too. Grownups are allowed to have fun too! Third. Thank GOD she was wearing shorts under that dress.
Another thing I love about this video is the other ladies you hear in the background laughing and giving her a hard time. One lady assures the stuck grandmother that no one can see anything because she's wearing the shorts, and another lady shouts 'Don't lie to her!' Hilarious.
The son-in-law finally comes to help her sort it out it all ends well, but this lady and this video are now internet famous!