Green’s Dictionary of Slang

cartwheel n.2

[the supposed sufferer ‘turns cartwheels’]

(US drugs) a fake heroin withdrawal spasm.

[US]A.J. Pollock Und. Speaks 19/1: Cartwheel, dopefiend going through a fake fit so that he might be given an injection by a sympathetic doctor.
[US]Berrey & Van den Bark Amer. Thes. Sl.
[US]J.E. Schmidt Narcotics Lingo and Lore.