That's an adjective (predicate adjective), not a verb. Mrs. Hanchey (my 9th grade English grammar teacher) would be so proud of me. ;^)
A "sketchy dude" is any older guy who would still wear tie-dyed T shirts.
This thread could be re-titled "Noob diver has tough time equalizing on C dive and gets bloody nose" pretty easily.
I always have some equalizing issues. Antihistimes always do the trick for me. I take some spray and pills in my dive bag in the dry box. If I have problems with the ears, I use 'em and it normally clears things up just fine.
For the bloody nose part, take a handful of sea water and wipe your face off before you get back in the boat. It looks better that way