It also feels a little strange in writing. Examples:
"Figure Figure11 shows a mountain gorilla lying on the ground on his side without a pillow" - Of course it is without a pillow, it's a mountain gorilla! What is this clarification?
"To start with, some Westerners have to hold on to a doorframe." - Would it not be better to say "you may have to hold on" or "newbies"? It is not like Westerners have some special physiological feature that makes them do it, it's about lack of practice.
"Figure Figure11 shows a mountain gorilla lying on the ground on his side without a pillow" - Of course it is without a pillow, it's a mountain gorilla! What is this clarification?
"To start with, some Westerners have to hold on to a doorframe." - Would it not be better to say "you may have to hold on" or "newbies"? It is not like Westerners have some special physiological feature that makes them do it, it's about lack of practice.