I Just Want To Brush My Teeth - Not Simulate An Earthquake

There is a commercial for the Oral-B electric toothbrush that emphasizes the vibrations of the brush by showing plates rattling and stuff shaking off of shelves while people brush their teeth. Does this strike anyone else as overkill? I certainly do not want a toothbrush that vibrates so violently that my dishes all the way in the kitchen start shaking while I'm brushing my teeth - that seems painful. And if it is able to shake me so hard that the stuff on my bathroom counter starts falling off, well, that just doens't sound like something I want in my mouth. How clean do your teeth need to be, anyway? My regular toothbrush does a fine job, and my electric one gives a nice gentle massage to my teeth and gums - I don't need sandblasting. I mean, the goal is to remove plaque and food, not enamel, right? I'd be afraid that the oral-B would eventually scrape my teeth down to nubs - assuming they didn't fall out from gum erosion first. And a nubby, toothless smile is not the look that I'm going for.