anaphylaxis.
Though more rare than with food allergies, there are people who will die if exposed to concentrations of pet dander.
I rather imagine they might be screaming and panicking if encased in a metal tube with animals.
Not that there aren’t people who just have some nutty phobia, just be aware that there are people for whom this is life and death.
She looked like she was breathing ok as she yelled at the cops. One was a service dog. one wasnt. The other on might have had a valid ticket, just like her.
If I found out that I was deathly alleregic to inside the confined metal tube I just entered, I would be leaving the metal tube un escorted and in a hurry.