This strip is a variant of the same kind of sudden reaction as the turnabout strips brought up before. Tossing objects is still a common expression of cartoon anger, isn't it? Do this in real life and I don't like to think of how the police would react.
I'm pretty sure I have never heard the term "pianoforte" outside of Peanuts.
The text of ROASTED PEANUTS is copyright 2009-2011 by John Harris. No copyright is claimed over the comic strips, which are here under the principle of fair use. Strips presented for review purposes only. We love Peanuts a whole lot, and wouldn't dream of exploiting it. Please don't sue us; we're only trying to love. Thank you for reading this notice.