Source: Bob the Angry Flower
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A 3 panel comic. Panel 1: Bob is being chased by a horse-like monster. Bob: “HELP! I’m getting ragdolled by–well… I’m not sure!” Panel 2: Bob: “Maybe a horse? Badly drawn?” Panel 3: Bob: “It’s kicking my ass, whatever it is!”


Looks like Bluecifer
That was my first thought too. Pic for the uninitiated: