A rail commuter slipped and fell into the gap between the train and platform during rush hour this morning.
The incident happened at around 7.20am as the man was stepping off the train at Norbiton station.
A spokeswoman for the South West Trains Network Rail Alliance said: "A member of station staff assisted the passenger back on to the platform.
“The person involved was not injured and subsequently left the station shortly afterwards without requiring any medical attention."
Leanne Lucy McGirr tweeted: “My fear of the big gap between train & platform at Norbiton was confirmed today, a man fell beneath the train. Luckily he's ok #scarycommute.”