So I managed to ride the Mansion twice tonight and got two times from the moment the safety bar came down to the final GH laugh and got two slightly different times:
The first was 5:27.24 with a couple slowed down handicapped moments. I also had to stop the timer a couple times for some rowdy teenagers (one of whom popped a stink bomb in my stretching room... Not pleasant at all).
The second time was 5:21.27 all the way through with no stops or speed changes. Going on Mansion right before closing is awesome, by the way. I shared a stretching room with 5 people and had a long stretch of empty doombuggies ahead of and behind me. It was supremely creepy and really enjoyable.