The modernist movement in literature was a 'reaction against' traditional literary conventions.
The announcement produced an angry/stunned 'reaction' from most of the people at the meeting.
There has been a 'mixed reaction' [=people have reacted in different ways] to the new policy.
(..) One, seeing herself years older would put her into shock, and she'd pass out... ...or two, the encounter could create a time paradox... ...and cause a chain reaction that would unravel... ...the space-time continuum and destroy the entire universe! Granted, that's a worst-case scenario. (..)1989 Back to the Future Part II
(..) This is heavy. It gets worse. Your daughter tries to break him out and gets sent up for years. My daughter. I have a daughter? This one event starts a chain reaction that completely destroys your entire family. Doc, this date... This is tomorrow's newspaper. Precisely. I already went further ahead (..)1989 Back to the Future Part II