Keter folding work table (even includes two vice grips!). Supports 1000 lbs. $49.99 at your local Costco (Amazon has it for $89.99). Yes, I have tested the 30 sec fold and unfold claim and it passes with flying colors.
If you're looking for a folding workbench that goes where you need it, when you need it, try the Keter Folding Work Table EX. Constructed from sturdy polypropylene resin and supported by rugged aluminum