My math textbook for this semester has a Chapter 0.

Posted on Twitter over 17 years ago and archived here at /twitter/2009/05/27/tweet-1951767274/ in the Twitter and Facebook collections.
Proximate posts in the Twitter collection
newer Twitter post from May 29, 2009, 1960364839 29 May 2009
this post Twitter post from May 28, 2009, 1951767274 28 May 2009
older Twitter post from May 28, 2009, 1950572141 28 May 2009
Proximate posts in the General collection
newer > @insidecharmcity: RT @wjznews Stray Bullets Hit MD Nuclear 28 May 2009
this post Twitter post from May 28, 2009, 1951767274 28 May 2009
older Twitter post from May 28, 2009, 1950572141 28 May 2009