Weird Fear # 3: someone vomiting in my mouth

This is a tricky one to explain.
How could a fear like this even develop!!!
???
I was certified in CPR for many years because I was either working with kids or
working as a security guard...and during my CPR training I learned that sometimes
while performing CPR "Mouth to Mouth" the "body" will vomit.
I cannot shake that image from my head.
...and I know that at times...I was the only staffer on duty with CPR certification...and I know
for a fact that if you were in dire need of CPR...you'd be shit outa luck.

Luckily...I have never had deal with what would be a very awkward situation for me...and a fatally tragic situation for someone else.