We have quite the bump on our ramp up here at UND. It's one of those ones that drops down about an inch followed by an immediate bump in an upward direction of about an inch only about a foot away from the first one. We were getting prop strikes during taxi all the time. You had to be going on along at about 10 knots GS though to make this happen. This was happening so much people had to be reminded of taxi speed on the ramp, walking pace. DUH!!!!
Even if you were going along at a pretty good clip, I'm pretty sure if you have even the slightest bit of situation awareness you'd think to slow down for these bumps!