Random passerby who knows nothing about “trees”. What’s this [] number supposed to mean?

Absolutely smoked about 2 hours ago and I am a [6] still.

Hell yeah dude, let’s take it back to the old school. Just took a fat dab myself and I’m creeping up from [7]

Ah, the old ways. Nature takes it’s course [2] and climbing

Yes [5]

Captain? Where are you? I need an explanation!