Rookie Restaurant Mistake

I'm taking a course in wetland conservation and we had a field trip today to learn about wetland delineation. The school paid for the class to eat lunch in a classy restaurant.
So we go in, sit down, I go the bathroom and wash my hands, dry them, and check my blood sugar. 61. Okay, good thing it's lunchtime.
So I go sit back down, the waiter asks if we'd like a drink, tells us they've got water and colas. I ask about juice: he says they've got pineapple, cranberry, and lemonade. I ask for pineapple, and soon I get it; a tall glass of ice and pineapple juice with a straw. I ask for nutrition information and drink the whole glass.
The waiter comes back with a can of pineapple juice; the side says 8 oz is a serving and that there are 35 g of carbohydrates per serving. The waiter tells me I got 16 oz.
I wait until my dish, hummus and vegetables, arives, before I inject. I inject for 60 carbs.


Can you find the rookie mistake? Did I go high or low? Answer in next post.