I was running late for class the other night as my day job which pays the bills ran late, so I had one of my students stretch everyone out while they waited for their instructor to get his ass to class, (this almost never happens, so please dont think bad of me). I got there and di a quick change and jumped right into teaching rg basics through omoplata, emphasizing proper squeeze and clinch. today I feel as if every muscle in my legs has been worked slam out. I cramped al night last night and couldnt sleep for shit. lesson learned, stretching is crucial before the start of every class or old mr. rubberguard will punish you later.