Range Master Viking Kitty (RM-VK) has been noticing the dumb$h!t. Very anti-social type wasting electrons and promoting stupidity.
they worked as labeled... the Russians have grenades with zero fuze delay time for anti personnel/trip wire usage... the box has the time delay on the side... 0-9 seconds.. the box they used in this movie was zero or 1 if I remember correctly... I think the one fellow was a fatality. Using live fragmentation grenades for a movie is just a set up for a bad day as we see in your video link