Moving at the speed of light sounds awesome until you remember Einstein's party-pooping relativity! Physics enthusiasts know the horrifying truth - as you approach light speed, your mass becomes infinite, time stops, and you'd basically turn into a pancake of infinite energy. The colorful, happy cartoon guy represents blissful ignorance while the terrified black and white face shows the existential dread of someone who understands the laws of physics would make this "superpower" a one-way ticket to becoming a singularity. Careful what you wish for, superhero wannabes!