Annoying: when you go out to dinner and one person gets their meal, while the other is told theirs will be "right up." And "right up" turns out to be 10 minutes later, and it's totally the wrong order. One person sits there and waits for the right meal to be fixed while the other finishes eating.
Less annoying: when you're the person who gets to eat. Hehe.
Un-annoying: when your bill is comp'd to the tune of about $25, more than the cost of the screwed up order.
Sweet: When the free dinner turns out to be really, really good.