Sometimes I return my shopping cart and other times it took everything I had just to get myself to the store & through the aisles. By the time the bags are in my car my heart is racing and I'm in full fight-or-flight and it's leave RIGHT NOW or pass out.

Sometimes my friend returns her shopping cart and other times she can't walk anymore because her transplanted lungs are already working as hard as they can and she can barely catch her breath.

Sometimes my grandpa returned his shopping cart and other times he just plain forgot, even though it was years until his Alzheimer's was advanced enough to diagnose.

None of us is/was an animal or a savage or even an inconsiderate person, so kindly stop hurling those labels at us. Someone in your life has a disability you're not aware of and I guarantee you've made them feel like shit on multiple occasions without even knowing it.