On roller coasters I normally have zero problem, flats such as shot/drop towers/star flyers/screaming swings/top spins/top scans/slammer (rip) ect, I have no problem with, it's rides like Maelstrom that get me, and the worst one, are Skymasters, I actually throw up after every ride so I try to avoid them nowadays, which is a shame because my local fair has one