Why does this confuse you?
If you surrender, you will be safe. Fighting back would only make Cho mad.
There's apparently a very old story regarding that.
A group of merchants were confronted by a single Mongol warrior who, screaming at them and waving his sword, ordered them to line up.
Then, starting at one end, he beheaded one. Then another, continuing down the line.
Someone further down the line shouted "Fools! He is but one, we can take him!"
To which another replied "Idiot! Be quiet! Do you want to make him angry?!"