I want to know what is the biggest object you have got into your Prius? Let's see some pics too! I managed to squeeze a 36"x30"x18" sink cabinet in the back. I will post pics soon.
I routinely carry this: http://www.amazon.com/Werner-MT-17-300-Pound-Telescoping-Multiladder/dp/B0000VYDHK
9 or 10 of my friends, in the seats. ha ha! or my twin air mattress, the BEST for camping, really it's amazing.
Oooh, this is one of my favorite games! The best place to play is the big-box home improvement store with plenty of guys around who think they need a pickup to bring home three bags of mulch and a potted plant for the wife. I think the biggest single object so far was a new lawn mower (Troy-bilt walk behind in its big cardboard box.) It slid in perfectly with seats folded down, just barely clearing the hatch opening. Should have bought it on a Saturday morning instead of a weekday afternoon. There were only three or four people gawking.
The first week I had it I took a 2 seater couch. All doors closed and both front seats available. OK, it was a small couch and I had to remove the cover over the compartment in the back to put one of the couch's arms in it. Wish I'd thought to take a pic.
my 46 inch TV in its box. I also carried all the timber I needed to build my mum an access ramp to her front door.
i just picked up a schwinn twin sport tandem bike, popped the front wheel off and put the front passenger seat flat it fit with extra room. i think if i pop both wheels off it'll fit without having to put the front passenger seat down. that way when i want to bring it somewhere, i'll have my wife along to ride it with me.
When I first saw the thread title, I was sort of half expecting to see a pic of Bertha Butt, you know one of the Butt sisters but I'm really glad I didn't. Whew!
Fat people drive Minis (cover your eyes). We bought a 40 inch LCD TV at Costco and didn't worry about hauling it in the Prius until we saw the oversized box it was packed in (and never end a sentence with a preposition). As it turned out, we could've stacked 4 of them in the back and had room to spare.
I put a Bowflex TC5300 TreadClimber (its the extended tread version) in mine. The guy I bought it from said there was no way it would fit. I had no room to spare.