Britton Barker, who is from Amarillo, Texas, is in Rio with his grandfather for the Olympics and has been sharing the trip on his Twitter.
While travelling on the subway yesterday, a passenger offered his grandpa the seat reserved for elderly people.
Which of course, is a nice thing to do but, judging by the 'old' man's response, was highly unnecessary.
It's proof looks can be
deceiving.They guy's face in the background says it all.
Britton's tweet has gone viral, having been retweeted over 12,000 times.
And it looks like his 'Papa' is now famous - the photo has been trending in countries worldwide.
A GD inspiration.