The questions I would have are:

1) where do you keep your knife on your body?
2) how confidant are you that your going to be the one rescuing yourself?
3) what about layers of clothing.

If youkeep your knife like I do, in your front pants pocket and your leatherman on your belt, there a a very good chance you won't be able to get to the knife easly. The stabing and cutting potential is very much there. (think Will Smith I Am Legend sceene where he is upside down and has to cut the line)

Also think about the winter, your wearing an over coat.it is long. is ther a knife in the coat too?

I won't call you crazy for not having these tools, most call me nuts in the first place. But I will strongly sugest that you may wish to have a single purpose tool for this scenario that is not in your pocket and not on your first layer of clothing. Also think about opening up your knife with gloved hands.

I know that when winter comes around I always add a sheeth knife so that I can use my gloved hands to get to a knife.

Just my two cents.