burst forth

(verb) jump out from a hiding place and surprise (someone). Synonyms: leap out, rush out, sally out, burst forth. Example: "The attackers leapt out from the bushes."

(verb) be unleashed; emerge with violence or noise. Synonyms: explode, burst forth, break loose. Example: "His anger exploded."

(verb) come into or as if into flower. Synonyms: effloresce, burst forth. Example: "These manifestations effloresced in the past."