I finally understood why he felt that way. It's the feeling of being on the verge of making one of the most (if not the most) important decisions in your life. That night was the last night that the world would recognise him as being a single individual. From the next day onwards, his entire world will be shared and melded with that of another person's. Also, relatives and friends will now mention this other person's name in the same breath whenever they enquire about his well-being.
I thought that I would not feel as anxious since Her Royal Majesty and I had already been living together for more than a year since our wedding solemnisation at Mandai Orchid Garden. Yet somehow, it still felt every bit just as momentous.
I had taken leave for the day so as to take care of any remaining tasks for the wedding. The day started feeling like any other. I even woke up at the same time so that I could escort Her Royal Majesty to the MRT station in the morning. Later in the afternoon, I would be left stranded outside her office for 45 min when I went to pick her up from work.
We went home and continued packing the items needed for tomorrow. Initially, we had wanted to start packing for our honeymoon too, but there just wasn't enough time to do so. In the evening, Her Royal Majesty left for her manicure session while I took my stuff over to my mum's place. Since we were already living together, this was the self-imposed day of separation when both of us returned to our parents' homes, in accordance with customs that mandated the fetching of the bride.
I then went to collect the bridal car, a Mercedes SLK. In preparation for this moment, I had gone on several refresher driving lessons, and rented a car on numerous occasions to familiarise myself with the routes. I'm now reasonably confident that I should be able to make it through the day in one piece, even though that may mean driving the supercharged sports car at 50km/h.
The bridal car was rented through Weddingcars.sg, a car rental company specialising in bridal car rentals. We had originally selected the TD 2000, a replica of a vintage car:

Unfortunately, the TD 2000 broke down a week before the wedding, and we had to quickly pick another vehicle from the company's stable. We were not left with many options since we wanted a 2-seater convertible for our wedding. In the end, we picked the Mercedes SLK as it seemed the most stylish among the rest.
Like most sports cars, the car was built much lower to the ground, and packed full of electronic gadgetry. Even the rear view mirror was designed to automatically dim the glare from passing headlights. It was with some trepidation that I clambered into the driver's seat and slowly maneuvered the $200,000 mechanical beast out of the multi-storey carpark.
The machine was built for speed, but with me at the helm, it bounced at the slightest bump and watched helplessly as uncles in Toyota Corollas zoomed past it. Throughout the drive home, I kept reassuring myself that, at the very least, I was a safe driver.
Back home, I busied myself checking the stuff for the wedding and shifting some of it into the car. I'm still not very sure what it was that I was busy with, but I managed to keep myself engaged until about 1.30am. As I forced myself to shut the lights, I remember thinking that I should really get some sleep since I had to wake up at about 5am the next day. Perhaps my brother had gone to bed with the same thoughts during his time. And just perhaps, he also had the image of his wife firmly etched on his mind before he finally fell asleep.