I don't tighten down my straps anymore and don't have problems. It just could be ya need ta get back into the Groove again.
I ounce was standing a long time at a light with my bike. When the light turned I quickly jumped back on and missed first my right them my left pedal and gave myself a real good solid whack to my testicles as I slammed into my top tube. Two cars beside me had tears from laughing but both rolled thier windows down to offer assistance. Sometimes its just your turn...
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No matter where you're at... There you are... Δf:=f(1/2)-f(-1/2)