I don't remember if it's the CRJ or not, but I do recall that there is at least one aircraft in the UA/UX fleet where the pictoral instructions on the exit-door sticker indicate to throw the door out of the plane. Most say put it on the seat, which does seem the quicker/easier/safer route as long as there isn't a stampede of shoving people behind the door opener. Considering they always emphasize the weight of the doors, I've wondered how far an out-of-shape pax could throw it, but you're probably right about the net-weight of CRJ doors.

^ to the designers of the exit doors for specifying procedure this on the door-sticker and not just on the safety card. (though the door weight is sometimes but not always stated) I'll admit to not checking the safety card, but I do always check the door sticker as the door opening procedures (handle placement, direction, etc.) and door "throwing" procedures seem to vary somewhat between aircraft.

My favorite so far is 1R (so not a wing exit) on some sort of UX ERJ I was on a while ago. There's a giant sign to the effect of "warning 5 foot drop" on the door. I guess the plane is too low to justify a slide but too high to just jump out of without warning. Going to be a lot of broken legs if they have to evacuate that thing. . . .