Recap of the Contra hacks (+1 new one)

[mgman]

Most of you must have already seen this:
http://www.youtube.com/watch?v=_42lhQTY-no

At least some of you know about this pirate hack:
http://www.youtube.com/watch?v=BVEBk9_wTBc
http://www.youtube.com/watch?v=yT9OH5_Jp38&feature=related

Some of you came across this (currently halted) Super C hack me and someone worked on:
http://www.youtube.com/watch?v=zSG9wVdE7ok  (note, that's a slightly outdated version of the hack)

But here's the latest update from the same guy who brought you the 1 level hack demo:
http://www.youtube.com/watch?v=43_a_QOKD2Y