I open this page:
And see following result:
Looks like a bug. Sorry, if I have broken some rules of contribution. I presume Blog uses latest BS version and doesn't plan to show vertical scroll.
OSX 10.11.6 (15G1212)
Chrome Version 56.0.2924.51 beta (64-bit)
I think you'll find that the scrollbar is caused by that example being a embedded JSBin, rather than an issue with the carousel itself.