Those red, white and black leads fall off all the time, triggering a "Code Blue" in her ICU room. Usually it's just because the whore nurse swiped a fly across her face a disconnected a few of them.

I did the same ting once getting an EKG--the dude said he was done so I swiped all the leads off my chest, except it then registered a dead line. Ooops

BTW, if you're are not a whore, well-shaven, getting those things is like pulling on Crazy Gloo. The nurse asked once, would you like to to do that for you?" I replied, "Danke, I will abuse my own chest hair." We all had a good laugh.