how does an iPod get wiped out?

my laptop is broken so I downloaded itunes on chris' an d plugged it in and there was a new software update i needed

So I did the update but at the end of the install it randomly spazzed

noooo

So I had to unplug it and plug it back in and then it said I plugged in an ipod in recovery mode

And said I had to 'resotre' it, and when you click restore it reset it completely to factory

Basically iped everyytthing clean

gaaaahhh

awe

that sucks!