Rx8 running odd help please


Mazda rx8
So got back from town (40 mile drive round trip) car ran great whole time. Park my car and came back out to go back to town 2 hours later. Instantly felt almost like E brake was on but it was just that big of a loss of power. Running slightly rough but not really horrid considering i have probably 50% power loss. Any ideas?
How many miles on the car?
Did it throw a CEL?

I'd probably start with the plugs/wires and if that doesn't help move onto the ignition coils. Those coils a bit infamous for making the car do just what you're describing. Next would be a clogged cat.