How totally discouraging

One pound is 3500 Calories... There is no way that your mean was 4550 Calories. I think you're focusing way too hard on one thing that you ate. Your weight can fluctuate all throughout the day. While its a good idea to keep track of where your weight is going, be careful not to micromanage it too much. What truly matter is the longer term trend..

Now give yourself a hug..

Its just sodium/water retention - it'll go away.

Did you happen to check how much sodium was in that Chili's meal?

LOL! Well my response is very similar to the others. Sodium. Just drink extra water today to help flush it all out. It may take a day or so, but the scale will go back down. I promise. :-)

I've been "micro-managing" my sodium for a year now. Watch your potassium. They work together. If you're not getting enough, your body will store sodium like it does fat. Enough potassium will help your body flush the sodium. Restaurants are notorious for overloading their food with sodium. It's gross. I have fluctuated as much as six pounds from a meal that was too high in sodium.

Yes there are many many aspects of that food that can make you gain weight. It's not realistic however to weight daily and not look at the overal trend. The best way to monitor weight is on a weekly basis, however if you do do it daily (as many of us do) you have to have the ability to be okay with small weight gains and minimal weightlosses. As previously mentioned, your body can change up to 2lbs a day for pretty much no reason....and no that doesnt mean that if you step back on the scale in 24 hours that your body will have leveled itself back out yet.
Many things effect digestion. As mentioned before salt is ahuge one, higher salt equals higher water retention thus more weight.
Higher fatty foods than your body is normal (a person can still be under their goals/limits for the day, but if one day happens to be higher than the 'norm' for your body that week) it will take longer for your body to break that fat down...it'll happen still, but it'll just take a bit more time to get there.
Preservatives, less fiber, more fiber, less water, more water, just about anything that is different than the norm can throw your body for a loop. All this means is that your body will take longer to figure out what to do with it but in the end when it does, it'll all be fine.
The process of digesting food is a complicated one that we don't give our bodies credit for. It's a constantly changing puzzle of what is the right amount of acids, of minerals, of physical action, of hormones needed to get the job done, and not over or underdo it.

Essentialy if you were monitoring your calories, just give it time. If you gained 1.3 lbs today, you'll most likely lose it all tomorrow, you just didnt give the workers in your body enough time to figure out what they had to do yet (because afterall, restaurant food isnt something you give them all the time now is it?)

Also, it apparently takes 3 days for a weight gain to show from excessive eating. So your overnight gain can't possible from a fat deposit. It'll be gone tomorrow x

The sodium content in foods prepared out is horrible! And yes, that much sodium can make you hold on to fluids like there is NO tomorrow. Drink lot's of water and you'll pee it out.