其实除了我国中文的博大精深，英语有的时候也有些俚语之类的，你可以根据片剧的前后文联系，
bloom[英][blu:m][美][blum]
n.（常指供观赏的）花; 开花期; 最盛期; 健康有精神的面貌;
vi.开花; 使植物繁盛; 发光，闪亮; 大量出现;
Noun
the organic process of bearing flowers
reproductive organ of angiosperm plants especially one having showy or colorful parts
the best time of youth
a rosy color (especially in the cheeks) taken as a sign of good health
the period of greatest prosperity or productivity
a powdery deposit on a surface
Verb
produce or yield flowers
我认为他在看到灯亮了后，意思是内心很激动，（是不是影片在很危险的时候）引擎已经启动。