Boris Johnson knocked over a child during a game of street rugby in Japan.
The mayor of London took out the 10-year-old schoolboy as he raced down the mini turf pitch in Tokyo.
Toki Sekiguchi hit the ground and suffered some pain but was soon up and running again.
He said: "I felt a little bit of pain but it's OK."
The schoolboy said it had been "enjoyable" meeting the mayor.