Austrian wheat beer is known for the head, and the amount of time it takes to draw on tap. It stands to reason the slightest ill-treatment in a back-pack in a bottle would make it foam.

It's nothing you did, and your expectations aren't out of line. Many people think the wait is worth it, and they forgive the long wait and popskull headache the next day that must be due to the high sugar content, clean taste, and slightly sugared aftertaste that makes your saliva slightly thick.

As for me, I've gone the other way to light and cleans where all traces of the flavor are gone within five minutes. I'm done with beer that tastes and has the consistency and staying power of oatmeal. Sometimes that means my friends are choking down Guinness Extra Stout in the interest of being cool while I enjoy a Miller Lite or Bud Light.