I don't think is a very good emoji, because maybe the facial expression is there but it's small and dark, and looks like a guy making a slightly-scrunched-but-essentially-neutral facial expression. A WTF emoji should have a big extravagant expression
Seeing this 2011-era pic has me thinking of the AVGN theme
PS I don't think the Jackie Chan pic sucks, but I had to go with the song.