๐โฆwhat came to my mind was the penguin using his umbrella as a weapon on the movie Batman. Those were the days! ๐
There was a real assassination where a Russian agent used an umbrella to stab a guy in the leg, injecting him with ricin. https://en.wikipedia.org/wiki/List_of_incidents_involving_ricin#September_1978,_London,_UK,_assassination_of_Georgi_Markov