I had the same type of Snowflake twice on the weekend. Snowflake Slowpackgroceryus.
For the first encounter, the lady in front of me at the grocery checkout took her sweet time packing up her few groceries, putting on her hat and scarf, checking her phone, adjusting her sunglasses, etc. - all while my groceries were piling up on the conveyor belt behind her. Until she moved, I couldn't bag my stuff. This, of course, meant that the people behind me were delayed, to the annoyance of all.
Then, blow me down, it happened AGAIN the following day! Different store, different lady, almost identical behaviour.