You realise that you have failed to communicate your requirements to the client, failed to do due diligence on the requirements and assets before you signed the contract and badly mis-scoped the project based on your imagination of what non domain experts should know about your field of professional endeavour.
You realise that you have failed to communicate your requirements to the client, failed to do due diligence on the requirements and assets before you signed the contract and badly mis-scoped the project based on your imagination of what non domain experts should know about your field of professional endeavour.
You are likely to be eaten by a grue.