JP you can stack modes but after you start one you have to either go to the power bunker (upper right scoop) to "power" it back up to start another mode and stack it. Or if you go thru either one of the inlanes, it turns the power on for a few seconds so you can stack modes that way as well. ive had 3 or 4 modes going at the same time most games

i just try to get thru as many modes as possible so i can get to extra ball faster and also if you get thru all the modes it starts "System Failure" where its a 6 ball multi ball and any switch you hit during it is worth a ridiculous amount of points (i think 1 mil each one that registers) lasts for 45 seconds then it kills all the coils and drains the balls, then restarts with a new ball and you can go thru the modes again.

bang for your buck i think batman forever is pretty sweet too. just got one and am loving it so far. several modes, all with different goals and some difficult ones that i have yet to beat. has a kick back, a cannon like T2/ACDC and sweet ramps/habitrails.

you can time out the modes and it clears it on the list, you'd have to hit the 2 ball multi ball shot and the extra ball, but the rest time out and would result in system failure