I did that once. Headed out early a.m. for a road trip with my sister. I got dressed in the dark, and wondered why one of my shoes felt a little tight, but just figured that foot might be a little swollen. Didn’t notice it til we stopped at a rest stop about 100 miles from home. When I “sat down”, I looked down and started laughing. Had my sister stop at the first place that was open, Wal-Mart, and had her go in and get a pair of slip on sneakers for me. (I hadn’t packed extra shoes; just wore what I thought were a pair of all purpose flats.)
It could happen to any of us.