Cherry blossom
A person can drown in as little as an inch of cherry blossom. Nose and throat plugged, and you imagine that if you can cough it up it will make a fluttering pink cloud, but all it makes is a thick wet splat. All the beauty was gone when you tried to breathe it, and you only tried to breathe it because there was nothing else left. You have spoiled the spring insisting on air, but air is better than beauty, and it will be summer soon.