It shouldn’t need repeating, but there are so many times in life when we are shown the unexpected from someone or something we thought to be entirely predictable. ‘Never judge a book by its cover’ has never been as apt (or accurate) as it is in this video, courtesy of the upcoming 2016 Summer Olympic Games in Rio de Janeiro, Brazil.

You can see the discomfort and mild surprise in the eyes of several gym-goers as our stars walk in unassumingly, only to show their true skill, talent, and character as they quietly and humbly destroy the doubters in the gym. Whether it’s setting a new treadmill record, tossing your opponents around like rag-dolls, or even putting weightlifters to shame with your small stature, this video teaches us yet again that you should never judge a book by its cover.