This is a question for anyone who has suffered a muscle/tendon tear or similar injury.
In all videos I see of this happening, it looks like they have everything under control and suddenly it snaps. My question is, was there any feeling beforehand warning them of eminent danger? Were they pushing through immense strain, mild discomfort, or did it really take them by surprise? If we feel completely comfortable with a movement, with no discomfort during or after, is there still a chance of injury?