To give you one example: half the time, the first symptom of heart disease is death.
Last week a practice member was in a relatively minor car accident. She kept saying she was "fine!" but I insisted that we do a re-exam to find out for sure. Fortunately, there was no evidence of tearing of her muscles or ligaments (which would have caused pain), but there were other distortions which would mostly likely lead to problems down the road, so I recommended a short course of corrective care.
Kudos to all who make the wise choice of getting a check-up after any injury, no matter how minor it seems!