I know a good and trusting friend will always watch their best friends back. But what if there was a incident where someone who is holding a gun and has a itchy trigger finger ready to pull. The gunman is ready to fire and the target is your best friend. He shoots and you spring out and take a bullet.

I don't think it can be done and there are two reasons:
(1)a human reflex is fast enough against a guns trajectory
(2) when a bullet hits the body, the bullet will exit out of the victim and hit the target behind the person

Sorry, wrong on both counts.

1. A human would not be quick enough.

2. Bullets do not always pass right through.

I'm sorry, the first one was a typo error, I've meant a human reflex cannot be fast enough against a bullet trajectory

I should have realised that.

This is actually a good myth and would make for a great episode. Did you post this in the movie myths forum? I have sen this exact scenario in many movies.

quote:

I have sen this exact scenario in many movies.

Movies? How about in real life. Dig up and watch the video of the attempted assassination of Ronald Reagan. In particular, the Secret Service agent who dove in front of him, taking a bullet. Not exactly what the OP described, since Hinkley had already started shooting & had hit the president, but pretty damned close.