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Looks can be deceiving. When Muay Thai champion Germaine Yeap turned up at the Damansara Perdana Muay Fit gym in Malaysia to start training, the trainers there were concerned they might hurt her.
Once they got into the ring it was clear the reality was quite the opposite.
MadMax TV recorded the prank, which you can see below:
Females really are strong as hell.
More: These powerful photographs prove that strong is the new pretty