Valentin Pletzer shared a screen shot with me on Twitter of Google testing showing image icons in the related searches box. When they are expanded, they load what looks like a featured snippet. I am not sure if this is a bug or a feature, to be honest. Here is a screen shot from Valentin of it in action: Here are some more examples of this in action: It is like Google is combining features snippets with related searches. They also look like the expandable featured snippets but again, this is in the related searches box. Have you seen this? Forum discussion at Twitter.