Init.d script causing boot hang

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http://stackoverflow.com – I successfully installed a script to automatically launch in /etc/init.d on my new Raspberry Pi. Unfortunately, it is a node.js app that never returns, and therefore hangs the device during boot (this is on Debian). Yes, I'm an idiot. Is there a secret handshake I can do during boot to prevent it from running my init.d script so I can get to login and a shell to fix it? (HowTos)