I started having very painful cramps a few years ago when I was serious about training. I never heard of cramps hurting so bad and before these episodes, I thought cramps were just a minor issue. This is the first video that I came across that talked about seriously painful cramps I started feeling. Also, in my case, they were not restricted to just the inner thigh.
My only saving grace is that I never had these cramps on a ride or run. They always happened after being home for a few hours.
Interesting video if you've ever suffered from excruciating painful cramps.