Well, THAT was an interesting homecoming this evening.
I got home at the usual time, expecting to find Panda and Fernando in their litterbox as usual this time of day. Instead, what did I see but a white bunny and a black-and-white bunny taking their ease on the sisal rug! I was quite perplexed at first, but the mystery was solved as soon as I saw the open front door of their condo; somehow, I didn’t latch it properly this morning when I left, and they eventually figured it out and made their hop to freedom! 
VERY much fortunately, they appear not to have been out that long and didn’t chew or eat anything they shouldn’t, except a few stray papers – I was particularly worried about a couple of stacks of books I had on the floor, including some I’m currently selling on Amazon – but they were intact.
Even more happily, the electrical cords and cables are all intact, not just because of the potential for damage to equipment but so much more so for the potential for injury to the buns. *whew* 
Panda and Fernando knew they were being naughty, of course, and scampered for safe hiding places as soon as I approached them.
It took about fifteen minutes to get them both in hand again and both back safely into their condo – especially Panda, who was hiding under my recliner.
Needless to say, I was very gentle with both of them, catching them as carefully as I could and cuddling them while I told them I loved them and I was glad they were safe. Once they were back safe and sound in their proper home, I proceeded with changing their litterbox, then giving them their fresh water and evening salad, and I then gave them treats to show them I wasn’t mad at them.
Really, I’m not – I was just worried they might have gotten into something they shouldn’t, so I’m going to keep an eye on them for a day or so just to be sure they’ll be all good.
Lesson learned: always double-check the latches!