adventures in "reply all"

Today in the library, I received the following email:
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To: Laughing, Guy-Friend ...list of other people
From: StudyGroupGuy
Subject: Party!

Hey study group! I am having a party next weekend, it would be cool if you all came!

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I then replied to Guy-Friend:
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To: Guy-Friend
From: Laughing
Subject: RE: Party!

OMG! Cute boy in our study group is having a party!
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Then Guy-Friend replied to me:
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To: Laughing
From: Guy-Friend
Subject: RE: Re: Party!

Laughing, you clicked Reply All....
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And then PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC PANIC
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And then I received this:
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To: Laughing
From: Guy-Friend
Subject: RE: Re: Re: Party!

Haha! Just joking!
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And then I spent the afternoon scheming about leaving flaming bags of poo on Guy-Friend's doorstep.