Sometimes chess players play their opening moves in their games very fast because of their excellent preparation beforehand and familiarity with the position. They do this in “autopilot” with very little thinking. Occasionally this can lead to disaster especially if they touch the wrong piece or an unexpected move is played by the opponent. (Generally a touch is a move in chess. If you touch a piece you have to move it.) Many famous players have lost games this way. Playing very fast can also have a possible psychological effect, giving the impression of confidence.
Sometimes we say or do things without thinking at all causing great damage in the process. Once we have acted to said something, we can’t take it back. We can only proceed from that point onwards. Better to keep quiet or do nothing than say or do something out of turn.