The River Effect

When one individual within a team or group speaks first during a presentation, however during their speaking they cover all of the notes which were meant to be covered by the group as a whole. This generally renders the rest of the group in a awkward and unpleasant situation of not having any information to contribute to the discussion.

River, Dave, and Alex are all presenting a project on elephants. They have a 2 page summary of notes.
River is the first to speak, and in his brief time speaking he covers all 2 pages of notes. This leaves the rest of the group with nothing to say.

This is "The River Effect" , everyone else in the group is stuck awkwardly stumbling for things to say or contribute.