Well, I went and did it.   Fell hard on my shoulder.   Thought I'd have to call somebody to get me up.  I hit the floor so hard that I thought about those personal alert commercials where the person couldn't get up.   Fortunately, I was slowly able to get my body off the floor and resume my activities..., but in alot of pain.

I landed square on the deltoid middle muscle of my left arm.   Everything happened so fast that I couldn't break the fall with either hand, although my right hand hurt for a few hours, so that means I probably tried.

Anyway, today, sore shoulder and all, I did the lineup "Glute, A, Calve, Cardio".   I got a break, though, as I didn't have to work on my back, shoulders or chest (B, C&S).  Then, it would have been difficult avoiding my lame left shoulder, which was so sore I could not raise my arm laterally.

Even though it is arm (A) day on the schedule I didn't have to raise either arm, just flex my biceps, wrists and triceps.  Those movements call for resistance below the shoulder, mainly.   Squeezing the biceps with my elbows attached to my sides (with and without dumbells), flexing my triceps by  by hold the shoulders tight, pushing up from a lowered position and squeezing the tricep muscles hard, and working the wrists each in a way that forces the forearms to flex hard.   I maintained the various flexed poses, stressing the muscles for many seconds and doing so in several reps.

Along with working my butt (Glute) and calves (Calve), and mixing 30 minutes of cardio-vascular (Cardio) work in, I successfully stressed my arms despite the temporary handicap.