Last night, our dumpster was emptied.
However, there's been a mattress standing up behind it for a while, and apparently it fell down while the dumpster was being dumped.
Result: very wobbly dumpster on a springy mattress on raised concrete, so anyone (well, many people) could just tip it over into the street. Maybe it would fall itself once filled (as filling would mostly be toward the front, probably.)
Initially my plan was to stick a couple cinderblocks under the hanging front end, but they weren't quite the right height, and I noticed it was actually light enough that I could manually tilt the dumpster up on one edge about 30 degrees--enough to get it pretty much completely off the mattress.
I couldn't, however, pull the mattress out while holding up the dumpster. Propping it up with the cinderblock on end held it high enough, but blocked the mattress in.
Luckily, Ayla showed up, and she pulled the mattress up while I tilted the dumpster off it.
So 'lifted a dumpster' goes on my list of accomplishments for the day. Not bad.