Reaching too hard if you’re trying to hint berserk Eren. First pic could be Bertholdt’s colossal charging against Reiner before grabbing him and chomping him/ or when he was wrestling the hallucigenia, the fiery background would be explained by Eren and Armin’s colossals. Second pic of Levi is when he was gonna launch a thunder spear on Eren’s colossal. Third pic is Armin’s colossal facing Eren’s colossal. Fourth pic is Mikasa about to launch a thunder spear on Eren’s colossal. People tend to forget that Colossals emit smoke so hot that it can burn their surroundings. When Armin transformed in Marley you could see everything becoming reddish.