Lol. It could be a two-part thing. Have people in dozens of stores in a shopping area freak out the customers with the code blue-ing, then freak out everyone in the shopping area as hundreds of people rush out of stores yelling "Code blue!"
Ok, I'm new here so forgive me if this has already been done, but how about reinacting the band scene from The Music Man in a mall (76 Trombones)? Get a group of agents to walk through the mall, some playing pretend instruments and the others singing and see how many shoppers you can get to join the parade through the mall singing along.
We just did our first freeze in Lisbon (a report with a video will come soon), I got inspired, and had an idea I think is new for a mission.
Books Alive.
A group of agents (50) would synchronize watches, go into a big book store, pick a book, and start at the exact same time, reading out loud in a dramatic fashion, for 2 minutes. You should have people reading all kind of books with different dramatic scenes.
OR
A group of agents (50) would go into a big book store, pick a specific book, and start reading in a specific order. Kind of Moulin Rouge (the movie) dialog, using different phrases from very different books. This would take a lot of preparation effort .
I used to play an improv game like this. We would all grab a famous play and open it at random and we could only converse using the dialog on the page. If you use really popular ones with famous lines it's very intertaining.
What about a cell-phone ringtone conversation? I know most cell phones these days let a person record audio, and then take that audio and use it as a ringtone. We could have 10, 15 people record different lines of a conversation on their phones and assign each ringtone to a specific agent, then pile them up on a table. Then, we have other agents call each phone in a way that'll have each ringtone go off at just the right time, creating a complete conversation.
I think we should have one number that everyone could call on the pay phone. If they pick up just start a conversation with them. It could be like "Is this Jamie" "No?" "Well, Who cares! I just need to talk to someone about my life. I'm a wreck. I just lost my job, and my husband wants a divorce" Then keep going on about random bad stuff that you are pretending is happening to you until they hang up. If they don't answer. We'll just have everyone in line leave a different message from a different person/company.
Or you could just pick a phone booth that can be called to.
One person calls the phone booth, and other agents act as a random pedestrians. When the phone booth rings, one agent walks curiously over to it, looking around (is anyone going to answer this? No?). Picks up the phone, and then has a conversation with the person on the other end. Some sort of dramatic conversation where the agent eventually breaks down and admits that their life is in shambles... and then they listen intently for a while. Then their face lights up and they say "thank you, Jill! Thank you, thank you!" enthusiastically. They hang up and walk away-- all smiles.
Next agent comes in (after a bit of time) and a similar thing happens. Different "life shambles," of course (and they needn't ALL burst into tears), but the agents all seek advice and leave the phone smiling. They must all mention that Jill is on the other end (as to establish that the same person keeps calling the phone booth).
Thank you, mysterious "Jill" phone friend. You have solved our problems.
(If a non-agent answers the phone, the caller agent will simply say this: "Jill like pickles" over and over in a very soothing voice. "Jill likes pickles.... pickles... PIckles... piCKles.... picklessss.")
A good way to draw bystanders in to take notice rather than just ignore someone else's telephone conversation (as is the norm) :
Have the agent answering the phone, at some point, describe the attire of the people nearby, then return to the conversation. Can you imagine standing in line and not listening in when someone has just described you to someone else over the phone?
Cell Phone relay
Go to a grocery store with equal number of Agents, choose neighboring aisles. Call Agent on opposite Aisle, engage in inane conversation. "Where are you?" "Chip Aisle,you?" Cereal Aisle, etc., then pass conversation onto next Agent by calling Agent next in line in opposing aisle.