Here is how I would rank WDW's roller coasters by intensity.
1. Rock n Roller Coaster-DO NOT TRY unless you are ok with all the others, this one features a launch at the beginning and some inversions
2. Expedition Everest-There is a pretty big drop on this ride, but the really gut-wrenching part is the backwards portion for a good 20 seconds
3. Space Mountain-This is not very intense for roller coaster standards, but it contains some short drops and it's bumpy, jerky, and DARK.
4. Big Thunder Mountain-This one is very tame. It contains few dips, but it turns sharply and there is a rattling part for a "runaway train" effect.
5. Barnstormer-This barely counts as a roller coaster. Located in Toontown, this ride is for preschoolers and it isn't very thrilling.
Register on WDWMAGIC. This sidebar will go away, and you'll see fewer ads.