If you call 911 because you think your blood pressure is skyrocketing, please have some desire to have someone do something about it. Calling for an ambulance should probably indicate a desire to be transported to the hospital. When fire & ambulance arrive on scene, telling them that you don't want to do anything and would like to see if it drops on its own is annoying. If doing nothing is how you want to treat yourself, that can be accomplished alone.
Disclaimer: If you think you need us, please call us. It's always best to call for help and not need it than to need help and not call.
[ /rant ]