What/why is this sidebar block appearing next to forum post?

[Scott Allen]

Hello all!! 

We love this sidebar block that appears in this one popular forum post in our forums, on the right... "TOP POSTERS IN THIS TOPIC", etc. 

We wanted to know the details about it, how and when it shows, and maybe even how we can force it to show for any (or all) posts that we want it for.  Any info would be much appreciated!  Thanks a bunch!

[Nathan Explosion]

Go to your ACP, type 'topic summary' and enjoy...

[Scott Allen]

Much thanks!! Found it!

[Stuart Silvester]