Trying to parse AWS JSON with ruby

Parsing JSON with Ruby?

I found a good example of how to parse JSON with ruby on stack overflow here => http://stackoverflow.com/a/13625633

For an example of AWS JSON, I found an example at (http://unix.stackexchange.com/questions/121718/how-to-parse-json-with-shell-scripting-in-linux), but I fixed some errors in the json and have a copy here (https://gist.github.com/Cinderhaze/f122232d15eb700449f0)
I put the above json in a file (ec2s.json) and ran 'gem install json'
I have tried the following in IRB

require 'json'
file = File.open('ec2s.json')
contents = file.read
file.close

parsed = JSON.parse(contents)
parsed['Instances']  #This returns me a value that looks about right

#What I want to do now is something like 
ip = parsed['Instances']['PrivateIpAddress']
name = parsed['Instances']['Tags']['Name']

[name, ip]

Here was my first attempt... let me know what things I did in silly ways! What's the more ruby way of doing this?

https://gist.github.com/Cinderhaze/36039d8521c22e5965ff