Cholla cactus spines in the knuckles of Producer Rob ... without necessarily getting the end of the spine in you, they will stick to you! Hence the name jumping cholla - even without realising ...

Typically, an evergreen rose cactus sheds its leaves when mercury ... Alternatively popular as walkingstick or tree cholla, cane cholla (Cylindropuntia imbricata) is another barrier plant worth ...

Assistant producer Lance Featherstone removes the spines of the Cholla cactus from a glove, after David plunged it into the cactus to demonstrate its vicious defences. Team doctor Patrick Avery ...