Funny Things to Say to Interns

“My favorite shortcut is windows + L, saves a ton of time”

I would always comment on their entry time into the office and say anything after 9:30 was mid-morning. 

"Bad luck they hired you for this project"

In Asset Management it's all about Trading Places quotes.
 

Are you going to be able to afford to get your kid the G.I Joe with the Kung-Fu grip for Christmas?

Also just randomly screaming out "PORK BELLIES!" is a lot of fun.

where did you do your undergrad?

Can you grab me a pen from the data room?

1. I assume you bought that online because you thought it would fit differently?
2. Ask them if they could make it a habit to arrive on time on a day when they arrive early 
3. Ask them to grab something from your desk that isnt there (e.g., copy of a CIM), wait for panic to ensue
4. Really pretentious questions (describe in detail why someone might opt to summer in Nantucket vs. Martha's Vineyard, or is an AP or a Rolex more appropriate for an in-law's wedding)
5. Ask them no-win questions in group situations (e.g., why do you think a certain MD went bald so young)?
6. Ask them which other banks they applied to. Regardless of their answer, just say "Ah, sounds like you struck out everywhere else then, huh"

Either “Can you get these important pages I printed - I need them ASAP” (I didn’t print any pages.) or tell them at them “On Friday people wear really casual clothes around here.” (The first week they are there.), this will show you if they able to step back and laugh at themselves and not take things too serious.

My dad's work, back in the day, used to make interns call everyone in the office to tell them there would be "repairs to the phone lines".  Of course, there would be no such repairs.