I managed to get back out and finish the loop while revisiting what caused me to fall.
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Some kinda shoddy trench filling :/ hard to get a good pic as there were too many cars to take a pic of the actual spot but despite how poorly it came out on camera there was a section towards the edge on the left lane that sunk quite a bit.
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My best guess is I got air in the while then bounced off the lip on the other side and bonked, sending me up off the pads. Thereβs a white streak after the trenching that must have been my board scraping. What remnants of my knee are long washed away in the rain.