If it’s about a heavy-case of rugged computer, I guess ToughBook CF-U1 from Panasonic could be the one with magnificent resistance toward hard bumps, even from the brutal rammer!
Panasonic Toughbook CF-U1 is MIL-STD-810G certified, 6 feet drop test and IP65 certified. It can resist any type of vibrations, bumps, drops, rammed with rammer, and waterproof. See the video below for more details:
Absolutely rugged for any kind of condition. You can view the details of Panasonic Toughbook CF-U1 rugged notebook specs at Panasonic website. But to make a summary, this rugged PC has been equipped with Intel Atom Processor Z520 (1.33GHz), 1GB DDR2 RAM, 16GB SSD, WiFi, USB and SD card slots, backlit QWERTY keyboard, and a small but sturdy 5.6-inch WSVGA sunlight-viewable screen.