Yay! The crate trick worked for 1 of the items hanging high by spider web, however another one just got stucked like crazy glued, I can reach it but can't move it.
BTW, to Tourist McGee, the trick only works with crates (cubic or retangle ones) since they are the ones which have the "Climb On" option when you right-click them. The round barrels can be stacked, but you can't climb on them.