This joke is from the iconic "Sonic Rainboom" game that can be seen when you first sign up for the game. The game included the description "PlayStation 3 controls intuitive enough for seal" written by Mikel, which was interpreted by Valentine who drew the panel, unexpectedly featuring Seal (the singer) instead of a seal (the animal) as most people would have assumed would be drawn. This last-minute twist, combined with Valentine's great art style was the perfect punchline to an already-funny game.

The full game can be seen here: