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Tech or treat! Halloween stunts from Google, Lyft and Amazon

Silicon Valley is feeling festive this Halloween, with tech companies offering treats like a mummy T-Rex skeleton or a Rolls-Royce ride with an otherworldly passenger. Here's some of the ghoulishly good fun from Google, Amazon and more.Hitch a Lyft ride with the Headless HorsemanRiders who dare to order a car through the ride-sharing service Lyft on Halloween night could end up rolling with a sup
Hail a Lyft on Halloween ... if you dare ... and you could end up cavorting with a headless horseman.
Hail a Lyft on Halloween ... if you dare ... and you could end up cavorting with a headless horseman.Lyft / Lyft

Silicon Valley is feeling festive this Halloween, with tech companies offering treats like a mummy T-Rex skeleton or a Rolls-Royce ride with an otherworldly passenger. Here's some of the ghoulishly good fun from Google, Amazon and more.

Hitch a Lyft ride with the Headless Horseman

Riders who dare to order a car through the ride-sharing service Lyft on Halloween night could end up rolling with a supernatural passenger. 

Lyft customers in New York, San Francisco or LA who ride from 6 p.m. to 11 p.m. could be picked up in one of three vintage "ghost cars" prowling each city. They'll score a free ride, receive Halloween treats and .... oh yeah, sit beside a headless horseman.

The ghost cars -- which include a 1933 Rolls-Royce Phantom and a 1961 Bentley -- and their spooky passenger are a stunt to promote the show "Sleepy Hollow" on Fox. Don't live in one of these three cities but still want to get your double-H fix? Check out #SleepyHolloween on Twitter.

Hail a Lyft on Halloween ... if you dare ... and you could end up cavorting with a headless horseman.Lyft / Today

Mummified dinosaur at the Googleplex

Some companies let employees bring their pets to work. Google has a pet T-Rex skeleton named Stan, who's a famous fixture at the Googleplex in Mountain View, California.

Though Stan is already a festive bag of bones, he still got decked out for Halloween. Googler Louis Gray posted a snap of Stan the Mummy on his Google+ page: "Considering the T-Rex's age, and our association of mummification with more ancient times ... this works."

Google's T-Rex skeleton Stan is a mummified bag of bones.Louis Gray / Today

Download $115 in spooky Amazon apps for free 

Amazon is treating customers to $115 in paid apps and games, available for free download through November 1. The trick: You'll have to download Amazon's Appstore for Android first.  

The pack of 40 free apps includes classics like Sonic the Hedgehog, steals including the human anatomy atlas Visible Body (which usually costs $30) and Halloween-themed games including V for Vampire and Plants and Zombies.

Yikes! Check out awful costume #Pinfails

Projects on Pinterest often look easy and fun, but they can go horribly wrong when regular ol' folks attempt them. Even Pinterest itself can apparently poke fun at a good #Pinfail, as the company put together its own pinboard of unintentionally scream-worthy Halloween costumes (check out the deformed Bert and Ernie that aren't meant to be scary!).

Want to avoid your own Halloween #fail? Check out Pinterest's last-minute costume idea pinboards.

Ouch.Pinterest / Today

Slackers only: Postmates will deliver costumes on demand

If you're reading this and you STILL don't have a costume ready, Pinterest projects might be too scary to undertake now. So for you, super-slacker, delivery service Postmates will deliver costumes on demand in San Francisco, New York City and Chicago. But Postmates has been delivering the costume goods all week and there's no guarantee you'll find your top choice in the costume section of the app. 

So if you end up on Pinterest's #pinfails board, there's no one to blame for the horror but yourself.