Common theme. In Rescue Dive training, the mantra is do not turn a solo rescue into a double rescue.
Not long ago, just a month or so, I went to bed upstairs at 2 am, and took off my emergency pendent and dropped it on my bedside table. In a short time, there was a loud banging on my door. When I dropped the pendant, it hit something that punched it's button and it alerted the base unit downstairs and it called 911. Since I was upstairs, I didn't hear that happen.
I went to the door and it was like Christmas with so many flashing lights going. Two cop cars were there, the fire truck, and ambulance. There had to be 12 or so people standing there and the firemen were ready to tear down my door. I held out my pendant and said what happened and apologized profusely.
When they were convinced I was okay, the procession left my house. The police show up to make sure the situation outside isn't dangerous and are ready to deal with whatever is inside. After they make their outside assessment, the firemen are there to tear down the door and evacuate the patient from upstairs if that's where the patient is. The EMTs are there to deal with the medical emergency.
I think they were there within 8-10 minutes of the unit calling 911.