Oh no, of course your friend wouldn't tell you about that part!
I always loved rollercoasters myself but my DH doesn't like them, so I haven't been on one in years til RnR. Luckily my brother's family was in WDW with us so I got to ride with my sister n law (after she went on with my brother).
It is a real rush, that coaster, but I have to admit, I must be getting old, we were in the last car and I really thought I was going to lose it (and I'm not one to get sick on rides either) when the coaster took off, (I could feel my heart hit my back)

but, the rest of the ride was such a rush. (it is a fast ride though). Very cool! (if you like Aerosmith, don't miss it).
I'm not sure you can do "baby swap" with 2 kids (to ride with your husband, although not sure if you're 5 yr old will appreciate that), otherwise, get a Fast Pass and have them take a break outside (that's what we did and we went in shifts). If you just go yourself with a FP you should be in and out of there in 20 minutes or so. It's a good place to watch the Tower of Terror (now that one I couldn't take at all again).
Enjoy and just go with the flow at nite with your little ones.
Just 17 more days or is it 18, can't count, but I know it's coming up soon!