Is there anything that will cause me to instantly fail the driving test in Alabama?

While you can fail your test through not scoring well enough on the test, you can also fail your test due to singular catastrophic errors. If you are taking the driving test in Alabama, you can fail automatically if you commit any of these acts:
• Violate a traffic law
• A dangerous action (up to the examiner to determine)
• Any accident you could have prevented, regardless of legal fault
• Not cooperating with the examiner
• Refusal to perform any maneuver