You’re in a mental institution. You’ve been with us now for six years. Do you remember?

[...]

The Slayer, right, but that’s only one level. She’s also created an intricate latticework to support her primary delusion. In her mind, she’s the central figure in a fantastic world beyond imagination. She’s surrounded herself with friends, most with their own superpowers …

Buffy – 6×17 Normal Again (marzo, 2002)

For the last 5 1/2 years, you’ve been a resident of the Fairview Psychiatric Hospital. Everything else — your superpowers, your alien lineage, your secret identity… it’s all a delusion.

Smallville – 6×12 Labyrinth (enero, 2007)