So how pissed would you be?

You shouldn't even have had to emphasize that you had a SEVERE allergy. You asked for no almonds, and when you received your dessert only to find the almonds, she should have taken it back to the kitchen and bring you the correct order. Jennifer's ambulance comment is enough to get any server fired. On the spot.

The manager's response is incredible. There's no way in hell that could fly at any other restaurant. If I were the manager and I found out that my waitress treated a customer like that, I'd be irate, and I'd do anything to rectify the situation. Comped dinner, gift certificate, anything so that my higher ups wouldn't find out.

As someone who also works in the food and hospitality industry, I'd be shitting bricks right now because the events of tonight could easily spell L-A-W-S-U-I-T!

I'm sorry you had to go through this, Andy. I hope you're feeling okay.