I'm sure with a little ingenuity you could rig up stringman to stab you to death!
Getting it to be forceful enough would be a bit interesting. Could certainly slowly strangle you in the cabling.
It could also strangle you super fast, see here; Red Cable Robots Video[1]
Depending on how high your ceilings are, dropping items from height could be quite uncomfortable.
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Poison tipped syringe!