In 2014, 2011 Stanley Cup Champion Boston Bruin Rich Peverley collapsed on the Dallas Stars bench with heart trouble. It was terrifying. The Stars and Bluejackets agreed to stop the game while Peverley was attended to. Rich Peverley luckily lived through the ordeal, but unfortunately had to retire due to health reasons.
The Dallas Stars have released a video about that fateful night and the aftermath thereof. Here it is:
It's about 24 minutes and pretty serious, but a good video. Rich Peverley speaks in it about trying to come back and play again, as well.