Forgot my umbrella on a rainy day

The sky looked fine when I left home today, so I didn't expect it to rain at all. But halfway through my walk, it suddenly started drizzling, and then it got heavier and heavier, so I had to find some nearby eaves to shelter under. After waiting for a few minutes, the rain didn't let up, so I had no choice but to brave it and keep walking. On the way, I saw someone on the roadside lending an umbrella to their companion, and I suddenly realized how much more convenient it is to have an umbrella. By the time the rain finally stopped, I was almost completely soaked. It wasn't until I got home that I discovered I had actually been carrying a folding umbrella in my bag the whole time, but I had completely forgotten about it.