but one issue is that, while the videos come with a few exercises sprinkled within (typically one per concept), they don't come with enough to really check whether i understand a thing. and then finish the legs lifting the tent pit into the air. black bands like this are caused by the shutter curtain blocking part of your image during the exposure. build yourself up to doing a full push up. some people say that life is not just fun and games. for example: f****** magnets, how do they work? then a maintenance program of 1 treatment every 2 months. 