Nak, nak, nak, doof. Yes, those are the sound effects of a cane tapping around and eventually hitting Amy. Add a few more "doofs" and then some sniffing sound effects, and you'll have either 1) a really cool remix of some random song, or 2) an orchestral arrangement of Terezi's greeting of Amy.

"Hello, fine lady! You're smelling awfully lovely this wonderful evening! Hahahahah!"