Water thrives when under pressure, much like spelling-bee finalists and fast-food drive-thru operators at the Indy 500. Unleash pressurized power with today's Groupon to Terrible Herbst, valid at 17 area locations in Las Vegas, Henderson, and Bullhead City. Choose between the following options:

• For $15, you get three VIP express exterior car washes with RainX (a $30 value). Click here for all 15 locations at which this option is valid.

• For $28, you get three ultimate full-service car washes (a $57 value), valid at the following locations: 3650 W. Sahara, 4070 S. Arville,109 S. Rainbow, 10890 W. Charleston, and 6034 Centennial Center Blvd in Las Vegas, and at 4036 E. Sunset and 201 N. Pecos in Henderson.

Terrible Herbst's staff cares for cars and the environment by swiping vehicular surfaces with eco-friendly Blue Coral products. During the ultimate full-service wash, vehicles are scoured inside and out over 20–25 minutes. Valets escort vehicles to the drive-thru tunnel, in which cars luxuriate in a bath of foam. A car caretaker then towel-dries its exterior and takes to the inside, wiping windows, dashboards, and consoles, and vacuuming dirt and Australopithecus-era crumbs from carpets. Wheels emerge from the treatment purged of dirt, and tires debut enameled in a protective dressing. The VIP express car wash with RainX cleanses cars in less than five minutes with a human-operated pre-scrub, then sends them through the underpass to bask in bubbles and a spot-free rinse.

During both treatments, cars' epidermises are pampered with a soft-cloth wash, clear-coat protectant, triple-foam polish, and cucumber eye treatment.