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.
(..) What, now he's coming after me? Listen to me. James is a tracker. The hunt is his obsession. I read his mind. My reaction on the field set him off. I just made this his most exciting game ever. - He's never gonna stop. - What should we do? We have to kill him. Rip him apart and burn the pieces. (..)2008 Twilight