Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

This comic is a wordless narrative about modern internet addiction and the terror of being alone with one's own thoughts. A man is shown at his computer, then goes outside to check his mail. When he realizes he has forgotten his phone and has no internet access, the comic takes a dramatic horror-movie turn: a dark, monstrous force labeled "INTROSPECTION" literally attacks him.

The man desperately tries to fend off self-reflection by thinking about cat photos and music videos -- the quintessential time-wasting internet content. He eventually fights his way back to his phone and defeats introspection, bathed in the glow of his screen. The final panel pulls back to reveal someone watching a "guy hurt his balls" video, the lowest common denominator of internet entertainment. The joke is that we use the internet not for enlightenment but specifically to avoid any meaningful self-examination, and the comic frames this avoidance as an epic battle rather than the mundane scrolling it actually is.