halluciner
You're hallucinating from lack of oxygen and from the painkillers!
Tu hallucines à cause du manque d’oxygène et des analgésiques !
— Salyut-7 (2017)
I'm hallucinating!
Je suis en train d’halluciner !
— The Visitors (1993)
Tom is hallucinating.
Tom a des hallucinations.
I must be hallucinating!
Je dois halluciner !
— The Irony of Fate, or Enjoy Your Bath! (1976)