Perl saves the day

[bah@longitude.com]

>>> When I saw this this morning I laughed so hard. XKCD is really great,
>>> and still small so I highly recommend people read through the entire
>>> archive! :)
>>
>> I concur. The e^i*pi strip remains my personal favorite...
>
> Bah. I'm not smart enough to understand that one.

I guess I get it, but I don't think it's all that funny.  I think the
point is that, as hard as it is to believe, e^i*pi actually IS -1.