The engine suddenly 'roared (back) to life'. [=it made the loud sound of an engine and began running well]
The audience 'roared' with laughter. [=the audience laughed loudly for a long time]
The fans were 'roaring' [=yelling and cheering loudly] after their team scored.
(..) Three... (((Clang!))) Frying pans. Who knew, right? AAAAH! (Thug roars) -Head down? -Head down. -Arms in? -Arms in. -Knees apart? (..)2010 Tangled