The RAID barrier truck can deploy a temporary wall in seconds
The RAID by HESCO is a container truck that packs a very quickly deployable temporary wall in places of need. The wall can be packed with harder substances (like rocks or sand) and act as a slightly more permanent solution. Watch it go.
These guys built a fake concrete wall inside a German S-Bahn train
The work of Moses and Taps. Certainly one of the weirdest public displays of anarchy I've seen. I'm surprised they didn't paint the wall since that's their claim to fame anyway.