I don't know if you'll be able to appreciate this unless you're familar with Ultimate Spider-Man. Kong was introduced in the very first issue as one of Flash Thompson's friends who used to bully Peter. Throughout the series he grew as a character and was revealed to be a decent guy when not being used by Flash. By the end of the series he began dating Kitty Pryde.
Anyway, all the way back in #14, he deduced that Peter Parker was Spider-Man, but no one believed him and it was dropped.
Flash-forward over a hundred issues later with #119, Liz Allan has been revealed to be a mutant (the Ultimate version of Firestar) and the following scene occurred.
Also of note: Kong is one of the few characters who has no 616 counterpart. He's also a character on the Spectacular Spider-Man cartoon, which is pretty impressive given that the rest of the cast is populated mostly by Lee-era characters.