Node socket hang up on twitter stream filter.json get

I have the following simple Coffeescript code to access the Twitter Stream API

http = require 'http'

options =
    port: 443
    host: 'stream.twitter.com'
    path: '/1.1/statuses/filter.json?track=keyword'
    headers:
        'Authorization': 'Basic ' + new Buffer('[user]:[pass]').toString 'base64'
        'Host': 'stream.twitter.com'
    method: 'GET'

callback = (res) ->
    console.log res
    res.on 'data', (chunk) ->
        console.log chunk

    res.on 'end', -> console.log 'end'

    # res.on 'close', -> res.emit 'end'

http.request options, callback

Why am I getting

throw arguments[1]; // Unhandled 'error' event

Error: socket hang up