I did a bit of research and came up with this:

I have a 225g can of Bear Pause, contents 0.98% Capsaicin;

I have a 22 g can of Black Max Dog Repellent , contents 5% Oleoresin Capsicum (OC) & 0.5% Capsaicin

Fox Labs International web site states: 2% OC & 5% OC

According to Wikipedia, the free encyclopedia

web page

the Scoville rating for Capsaicin can be as high as 16 000 000
whereas for OC it will reach 5 300 000

So the bear spray would indeed be very nasty if used on a human.

“In large quantities, capsaicin can be a lethal poison. Symptoms of overdose include difficulty breathing, blue skin, and convulsions.” Wikipedia It is not clear however if this can occur from inhalation .