it's interesting to read from some drug wiki that deja vu is uncommon: "Although uncommon and inconsistent, a certain subset of people report strong feelings of deja-vu consistently when under the influence of nitrous oxide."

I get super strong deja vu every single time. Like I'm usually watching some show while doing them, and I'm convinced I vividly remember already having heard every single line of dialog even if it's something i've never watched before. my mind also goes back to the same couple memories over and over again that are hard to recall in any other setting