When Eren and Levi are fighting, Eren always refers to Levi as an anagram. Finally, after years of this, Levi asks Eren what the hell he means, and Eren replies by rearranging the letters of Levi’s name to spell ‘Evil’.
From that point on, when they fight, and Eren uses his name as an anagram for ‘Evil’, Levi’s comeback is to say Eren’s name is an anagram for ‘Shitty brat that never shuts the fuck up’.
Bath bombs’ primary ingredients are a weak acid and a bicarbonate base. These are unreactive when dry, but react vigorously when dissolved in water to produce their characteristic fizzing over a period of several minute carbon dioxide bubbles on bathers’ skin gives a tickling sensation some find pleasant.