What does it mean to "have a moment" with someone?

[Anonymous]

So today after school, me and my best guy friend/crush were walking together slowly on the sidewalk about a block from school and just having a random conversation. Then, one of our mutual friends came up behind us on his bike and braked really loud to scare us. I screamed and our friend teased, "I'm sorry, are you two having a moment?"
What did he mean by that?

[anastasis]

So, you don't know a "moment" is, eh.

Well, a "moment" is when people say your connected telepathically and enter into an alternate world through teleportal Stargate.

[Asker]

Haha that sounds like some awesome Star Trek-type abilities

[Anonymous]

A "secretive thing" or like one of those flirty things where you aren't paying attention to anyone else

[Asker]

Ohh I see what you mean lol yeah I know that I, for one, didn't even hear our friend approach and I wasn't really paying any attention to anything else and I don't think he was either, so I guess it was a moment :P