 
 <prompt> Wetin dem use for di things wey you fit enta make you get psychoactive experiences? Based on di question wey dey before dis one, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: According to Genius, the James Gleick-authored biography, Feynman try LSD during im time as professor for Caltech. E dey somehow shame for im actions, so e mostly avoid the matter when e dey yarn im tori; e just mention am small for the "O Americano, Outra Vez" section, while the "Altered States" chapter for Surely You're Joking, Mr. Feynman! talk about only marijuana and ketamine experiences for John Lilly's popular sensory deprivation tanks, as a way to study consciousness. Feynman stop to dey drink alcohol when e begin dey show small, early signs of alcoholism, as e no wan do anything wey fit spoil im brain—the same reason wey e give for "O Americano, Outra Vez" for im no too dey interested to experiment with LSD. 