I've never had a heart attack and hope to never have one at least not anytime soon.
Anyway when a person is having a heart attack they will feel pressure, tightening and pain in there chest.
The pain, squeezing, pressure and tightening of the chest usually happens on the left side.
Shortness of breath can or will also happen as well as having more pain in your jaw, stomach neck and even your back.
As soon as you notice symptoms of a heart attack in yourself or someone else you need to call 911 right away so they can be on there way to help you.
A heart attack is very serious and can kill you quickly so don't waste time in getting emergencies services on the way.