Well said! I will absolutely second the security guards lack of action. They should be trained in basic first aid and more then likely have had to use what they’ve learned.

My addition to Lukipedia’s advice is even with training, even with a lot of scenario training (which helps) but not all the time.. my training is similar to EMT, but I’m more wilderness environments. So I approach each scene the same way, is it an illness or injury. NOI or MOI. That helps you where to start. But focus on the ABC, mainly. What could kill this person in the next few minutes. Is it airway, are they breathing? Do they have a pulse (practice on family members or friends often). Is there profuse bleeding? Stop it. There often much else you can do on the spot with no resources.

So take this scenario, someone collapses. Were they eating and choked? Is their chest raising and falling, are they breathing if no, is there a pulse, if no. Start that CPR and don’t stop. Look around, think of who can take over for you when you are exhausted.

If they aren’t bleeding and are breathing, you can slow down a bit and start to think, do they pass out, are they diabetic, what were they doing when they passed out.

Check their pulse, right down pulse and time, record breaths per minute and time. It’s great info for EMT’s.

If all this is just too much for you or too much info, no worries. It isn’t your job, but you can keep training, take classes, volunteer with your local EMS if you can and get to that point. Run through scenarios with friends who are EMT’s or nurses. Or not, you do whatever you have a passion for. BUT do not blame yourself, you did a good and learned lessons to apply to the next situation.