Firth's Magnum Opus
The Child that Smelt Funny is Firth's best work, hands down. It is a culmination of all the things that have made his animations some of the most popular works on Newgrounds and the web in general. It is both quintessentially Firth - disturbing and unconventional animation style mixed with a sick, sarcastic sense of humour - all the while being different than any Flash he has submitted thus far.
The Child that Smelt Funny, unlike many of Firth's animations, borders on political - mainly regarding free speech and media influence. Of course, with having animations like Milkman and Valentine's Day Special under one's belt, it is likely a touchy subject for Firth.
Firth has always had a penchant for the unconventional and the deconstructive. Perhaps, some people just aren't ready for his style of brash and unwielding style of animation.