Personal Experience: I was trying to get a very generous severance package from a large telecom in the US that being offered to those who were to be laid off, as I already had another job lined up.

I tried the routine you suggest: I was insubordinate, condescending, arrogant, the whole bit. I was SURE I was going to be the one laid off.

They PROMOTED me! (I took the other job, anyway.)

Your actions are not always interpreted how you wish them to be.

Get your prospective employer to give you the 4 weeks. If they're serious, they'll make it happen. Put in your 4 weeks. Tell your boss you'd like an early out if possible. Hope for the best.

Personal Experience: I was trying to get a very generous severance package from a large telecom in the US that was being offered to those who were to be laid off, as I already had another job lined up.

I tried the routine you suggest: I was insubordinate, condescending, arrogant, the whole bit. I was SURE I was going to be the one laid off.

They PROMOTED me! (I took the other job, anyway.)

Your actions are not always interpreted how you wish them to be.

Get your prospective employer to give you the 4 weeks. If they're serious, they'll make it happen. Put in your 4 weeks. Tell your boss you'd like an early out if possible. Hope for the best.