You set off into the forest to find the other chimpanzees but you don't see
any of them. When a male is separated from the group, he will often drum loudly
on the buttress of a tree, hoping for a reply so that he can locate other chimps. This helps you
find your group.
Now that you are with the other chimpanzees you have many other opportunities to
socialize. Would you like to intimidate your peers with an impressive 'display' or
would you like to help solidify bonds between you and another chimp by grooming him?