Amazing total body workout with just one dumbbell

Think you need a lot of equipment for a killer workout?
So there I was in the gym the other day - I was looking for some 40 pound dumbbells - and could only find one (ever been there before?!). I remember thinking to myself - "Who only uses one 40-pound dumbbell?!" But then that got me to really thinking - "what kind of workout could I do using only one dumbbell?" Come to find out - I could put together a pretty amazing routine with just this one simple piece of equipment! Of course I couldn't wait to share it with all of you! With no further ado, I give you Tone and Tighten's "One Dumbbell Workout"!!
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