Dockside – a file shelf app and a macOS Dock companion

Dockside is a lightweight file shelf next to the Dock, where you can drag & drop files, folders, apps, and even text for quick access or later use. It also displays recent screenshots and downloads, or your favourite folders or even recent items for easy access. Lightweight and there when you need it, fading away when you don't, Dockside helps you manage frequently used items—all without getting in your way.

:) hahaha happened to record it when he knocked a great innings!