I got younger brother and not to long ago we had a huge fight and I lost.

He is like 10cm taller than me and has trained Muay Thai for 3 years.
The fight lasted for like 10min but it seemed like it was like one hour or longer.
I put up a good fight but just couldnt hold him back when he started to do
his Muay Thai on me. :/
His girlfriend was there and she told me after the fight that she has never been
so scared in her entire life seeing me and him fight. We are both pretty big
I am 185cm and he like 195cm and he is really good shape beacuse of
his traning.
We are cool now though and this is the only time I can remember we have been in a serious fight.