Video is still there if you fix the link. just checked
How old was that Chinese kid a couple of years ago that smoked like a carton of cigarettes back to back? in his 20's if I remember correctly. Aggravate the heart enough with enough stimulants the heart will go into an arrhythmia, some can be fatal.
It's possible. If they were standing near eachother, and it hit soft tissue, or shrapnel if it hit bone.