There are other people there with you, but not with you. People are forming groups around you. Something is binding them together; you haven't figured out the chemistry of it yet.
You draw closer to one collective. One of them says something that makes all the others in this group laugh. They all laugh, but you don't think it's very funny.
You don't know why it's funny. You don't have the history of funny within this group. If it is an inside joke, you don't have context. If it is a broad joke, you may recognize it, but not think it is funny because of how it is told. But people are laughing, they are enjoying the moment.
Are they laughing because they have heard the joke before? Are they laughing because they understand a particular context? Are they laughing because it is familiar to laugh at someone who is historically funny? Are they laughing because they don't want to be left out? Are they laughing because it's ironic? Are they laughing because it's true? Is it funny because of how it was told? Was a funny voice employed in the telling of it? Did the joke-teller emphasize the right word at the right time?
You don't know. Maybe it was all of those things at once. You don't know.
Something instantaneous happened in that moment that cannot be contained in one single mind. Collective minds erupted, adapted, expressed a reflex. It evoked a response that you are familiar with, but you will never know why, at that moment, it occurred within this collective. It is what is. What it is can only be what it is.
This is life. This is you. Sometimes you get the joke, sometimes you don't. It's not your fault. This is the world set before you. A joke that you aren't in on or a gift you are hesitant to unwrap.
You are allowed to laugh. Whether or not you choose to unwrap it is totally up to you.
This is you in a large room, filled with people you don't know. And you are you and they are them. And that is life.
"Life is only a dream, and we are the imagination of ourselves."