Tengen Toppa Gurren Lagann/Nightmare Fuel

For such an awesome, funny, and heartwarming show, Tengen Toppa Gurren Lagann has some scenes that are pretty darn scary.


 * The battle against
 * Also: "Don't touch that or I'll GOBBLE YOU UP!"
 * Hearing Kamina's scream right after he was horribly mutilated by Thymilph's spear in Episode 8 can be pretty terrifying.
 * Still... Spinning...
 * The results of Simon's Heroic BSOD following Kamina's death. Seeing the Cute Shotaro Boy turn into The Berserker who vanquishes Mooks with a No-Holds-Barred Beatdown, and is channeling so much Unstoppable Rage that his mech actually pukes and shuts down is... rather unsettling, to say the least.
 * The Ashtunga can be rather creepy.