[The Roamin' Umpire]

Originally Posted by dvasques

Never seen, in the NFL, a team a team win the toss, elects to kick and then, the oponent, on second half, elects to receive the kick again. And there were some examples of that on last season's gamebooks on NFL website

This is straight from NFL.com:

1. The toss of coin will take place within three minutes of kickoff in center of field. The toss will be called by the visiting captain before the coin is flipped. The winner may choose one of two privileges and the loser gets the other:
   (a) Receive or kick
   (b) Goal his team will defend
2. Immediately prior to the start of the second half, the captains of both teams must inform the officials of their respective choices. The loser of the original coin toss gets first choice.