For some reason, I've always felt like 7 * 8 = 56 is really weird. Like, there's no reason at all behind it. Whenever I hear or use 7 * 8 = 56, it just feels weird.
That's because your brain wound up set up to see numerical order so when you see two numbers in order, 7 and 8, that result in smaller numbers that are also in order, 5 and 6, which of course lead into the former two, it tricks your brain into thinking that it's wrong because it's somewhat backwards.
Likely depends on person to person since not everyone's brains set up numbers the same way.