A couple of theories for ya. 1. They try to baffle you with shouting and rambling, so you don't take too much notice of what is being sold and just buy. 2. They think if they shout and squeal they will sell more, but 'blindly', people buy without thinking just to be able to turn them off. IF you really want to buy something you 'force' yourself to sit through it: usually.I was wondering what motivates presenters like Jess to squeal and shout loudly? Do they believe that by doing so they sell more? And do they actually sell more with such behaviour?