Cutting between lettering on a cake that is attached. (Written in script). Eating cupcakes with writing on top of them.
Leaning on an Animal. Bottom Line on Using a Hammock or Swing Attached to a Tree. Sitting on an Animal;
more examples of "מבטל כלי מהיכנו" (nullifying a vessel from its normal usage) that come up on Shabbos;
is one allowed to tear pages from a sefar or book apart if they are attached;