The hover effects on Amazon’s big ‘ole “Shop by Department” mega dropdown are super fast. Look'it how quick each submenu fills in as your mouse moves down the list: It’s instant. I got nerd sniped by this. Most dropdown menus have to include a bit of a delay when activating submenus. Here’s an old Khan Academy dropdown as an example: See the delay? You need that, because otherwise when you try to
![Breaking down Amazon's mega dropdown](https://cdn-ak-scissors.b.st-hatena.com/image/square/678aa0908aa99a497df5e0edb5395aa3233563a1/height=288;version=1;width=512/https%3A%2F%2F64.media.tumblr.com%2F6ac1af45e5be9aa1e32a3a1d11bf813d%2F96541d7f363acfd3-c3%2Fs500x750%2Fd1c9fc7c84570aad2cdc9981d4d430f7fb801cb4.gif)