The Oregon player probably isn't doing a deliberate Heisman pose. It could be that the pose on the statuette itself was chosen because it is similar to a natural football movement. If somebody would break down the tape of every game for a season thoughout high school, college and pro football you would see hundreds of freeze frame pose caught in the heat of the action.
If it was a pose, than more credit to Fournette for being able to fit it into such a great run. I prefer to think that it was simply the true spirit of a great athlete reacting to adversity giving his all for the team. That is, we saw in real life, a glimpse of the same passion that inspired the artist who created the Heisman trophy. Perhaps, it's time to re-do the trophy --- Fournette's "pose" at the end, stretching to score the TD was great and true Heisman material.
Ed Smith, a triple threat player born in 1921 actually posed in the studio for sculptor Frank Eliscu, who had also been a high school classmate.
Who Was Heisman and Why Does He Have a Trophy? http://mentalfloss.com/article/29427/who-was-heisman-and-why-does-he-have-trophy
I guess I have too much time on my hands. It took me about 10 minutes to make that video with my phone. Also, he did not intentionally strike the pose like last year, he happened to hit it while catching his balance after jumping.
I can show you a bunch of still photos of hollywood/music industry type supporting the illuminati with various hand signs.