Is it the one that gives IBS-like symptoms, or am I thinking of something else?
It really depends on where the disease effects you.
For me (and my half-sister) it's a problem with our terminal illium (the end of the small intestine, where it dumps into the large intestine). It swells shut and no food can pass, which is extremely painful not to mention all the food that backs up into the small intestine and stomach (to then be vomited).
Well, I should say.. it used to swell up. I had about 15" of my small intestine removed in late 2006. There's a whole host of issues (and plenty of meds) that I have now because of the surgery, but at least I haven't had to go to the ER to be admitted with an obstruction since 2005!