Suddenly
81all of a sudden — suddenly, without any warning …
82burst into laughter — suddenly start laughing, start giggling …
83by surprise — suddenly, unexpectedly, amazingly …
84drop from the skies — suddenly appear …
85flared up — suddenly burst out …
86flaring up — suddenly bursting into flames; bursting into anger, bursting into enthusiastic activity …
87flying into a rage — suddenly becoming extremely angry, losing one s temper …
88jump back — suddenly move backwards, flinch …
89like a shot — suddenly, in the blink of an eye ; very gladly, very willingly …
90out of a clear sky — suddenly, with no warning …