I almost suffered from pulmonary aspiration as a child. I laughed while eating fish sticks, and some of the crumbs tried to get into my lungs.
Luckily, they got caught in my nose instead. Well, I didn't think I was lucky at the time, but I do now.
Those crumbs could not be blown out or sucked down into my throat. I tried all day. This was very uncomfortable, and I felt like I was in danger.
They finally got loose somehow and fell down into my throat. I'm glad that my nose protected me from pulmonary aspiration!