Tell me what this is. Lines. Two... no, t-three... wavy lines. That's amazing. You're...

[mid-credit scene; Dana is using Peter's old ESP machine with him hooked up]
Dana Barrett:
[she holds up a card with three wavy lines] Tell me what this is.
Peter Venkman:
[concentrating; closes eyes] Lines. Two... no, t-three... wavy lines.
Dana Barrett:
[looks at Peter, looks at card and looks back at him; she turns the card to reveal three wavy lines] That's amazing.
Peter Venkman:
You're amazing with your ability to flood my psychic powers.
Dana Barrett:
[Dana holds up another card] I can't believe you used to shock your students.
Peter Venkman:
Between us, I only zapped the guys.
[Dana flips a switch and Peter gets a shock]
Peter Venkman:
Aah! It's for science. I know that now. I admit that.
Dana Barrett:
[still holding another card] Ready? Try this one.
[Peter catches his breath]
Dana Barrett:
Take a moment.
Peter Venkman:
Uh... it's a five-pointed star? Yes?
Dana Barrett:
[smiles] How are you doing that?
Peter Venkman:
Some believe that true love imbues a subject with the ability...
[Dana shocks him again]
Dana Barrett:
Did you mark the cards?
Peter Venkman:
[chuckling] No.
Dana Barrett:
You did, didn't you?
Peter Venkman:
[pained] Yeah.
[Peter gets shocked again]
Peter Venkman:
Aaaah!
Dana Barrett:
Works well