James Randi tried to sabotage scientific spoon-bending experiments
On one occasion, disguised as a journalist and pretending to represent the science supplement of The Times, he gained access to a laboratory in London where they were researching metal bending by mental power. Randi brought with him electronic equipment with the intention of botching up the scientists’ instruments. However, the attempted sabotage was discovered, and Randi was expelled from the laboratory (but only later did they discover who he really was).