Hmm, that's a good thing! If you had been wearing a Seiko Monster with metal band, you may have done a lot of damage to your hand!. I'm an Intensive Care Paramedic and have seen the damage that can be done by watches when worn in an industrial setting. One guy got his metal watch caught in some machinery and it ripped all the skin clean off his hand....a nasty de-gloving injury (he was lucky he didn't lose his entire hand from the wrist).
I guess most watches are tougher than the MK1 human arm.