Yesterday I was doing cambered bar box squats. One of the reps I came down to the box and when pressing off the box, I felt what felt like a pop in my glute and a pain down my hamstring. If im just laying down I dont notice any discomfort but if I try to do a straight leg deadlift I feel pain from my glute all the way down through my hamstring and to behind me knee. I also feel it if I sit down (mimicing a box squat, legs out, knees out) and shift my weight forward slightly (similar to what the cambered bar would do).
Any advice what this is?