First of all, glad you're ok!!
You sure gave me something to think about. I have a very steep incline myself to get back home, and also have a stop sign right when it starts getting steep. So far so good, but then again I never thought of the possibility of a wheelie (darn inexperience!!)! So now on whenever I get to that stop sign, I'll make sure not to give too much throttle to my Ninja.. certainly not up for a wheelie yet! By the way, I always use the back break to get the bike not to roll back and then play with clutch/throttle to get it going, I think that works the best, I don't even consider the front break in that situation
