A few months ago I managed to “crash” an ATV while riding in the outskirts of Phoenix. I managed to hurt my knee in the process. I was wearing my heartrate monitor and just pulled this information from it. On the graphs below you can see how my heartrate spiked as I was sliding down the ravine, being pulled by the ATV. Unfortunately my battery died literally a few minutes after this happened.
Here is a link to the data from my GPS watch
And the charts:
