system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In response to the reddit gif post of a spider chasing a red laser dot, how and why did the spider pursue the laser like a cat would?

Honestly, I've always thought spiders only moved sensing movement to external stimuli.
gpt
The spider in that particular gif is a hunting spider, which hunts by sight. Because it's a predator (as cats are), the movement of the red laser draws its attention. Now, it doesn't know what that red dot is but it knows it's smaller than the spider so it could, quite possibly, be lunch.

Hoping for a meal, it stalks the red dot in a cute, cat-like manner.