Ver ver funny.
Give the kids more credit I say.
My 9 year old (4ft-ish) was in karate class when the teacher (6ft-ish) came up to her and asked her to perform the moves she was practising.
When he saw she was doing well he then asked her to put it into practise and said "Pretend I am attacking you, defend yourself"
Daughter duly blocked his attack then kicked him in the gooleys.
Don't know whether it was tears of pain or laughter.