As everyone else said, NOOOOOOOooooooo.
1) Major financial penalties for early withdrawal
2) Retirement is the ONLY life event you can't borrow for. While I'm not a fan of debt generally, it can be a useful tool when you need it (e.g., mortgage, school). But if you need it for retirement, it won't be there, unless you plan to finance your retirement with credit cards, which is an even worse idea.