Title text: Sometimes I'm terrified to realize how many options other people have.
Randall comments on the absence of physical enforcement for social norms. Cueball goes through a list of possible things he could do that only his conscience and learned social morals prevent him from doing, before promptly receiving a punch to the face justified with his own reasoning.
The title text is a restatement of the first line of the comment, but reversed to show Cueball's newfound realization that the same freedoms apply to other people, to his physical detriment.
This is also an ironic reference to Zechariah Chafee's oft-quoted line, "Your right to swing your arms ends just where the other man's nose begins."
- Cueball: Sometimes I'm shocked to realize how many options I have.
- Friend: Oh?
- [Cueball shakes his fist.]
- Cueball: Like, at any moment in any conversation, I could just punch the person I was talking to, and all these potentially life-changing events would unfold.
- Cueball: It's only my mental rules that stop me from punching you, or stripping naked, or getting on a plane to Fiji. Sure, rules have reasons. But shouldn't you exercise that freedom at least once before you die?
- Friend: Hmm.
- [Cueball is knocked down on the ground, dazed and bruised.]
- Cueball: Okay, I should have seen that coming.
- Friend: But you couldn't! That's the beauty!