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UPDATE for thos who combine it with the flopper rock glitch.
Originally posted by HeAdsWillRoLL
Tips if your doing this glitch...
Make sure you use 2 people, one can stay at the rock glitch and run out when the excavator turns on and keep turning it off. (With hacker) They can shoot at the group of zombies while one knifes from underneath. (If the excavator breaks the dome the person in the rock glitch can die, and the zombies will be very hard to knife because of the bouncing)
Make sure the first perk you buy isn't one you want to use while under the stairs, say if you want PHD flopper make sure you buy like a random perk like Double Tap or something first then buy PHD flopper. Because the astronaut will take the first perk. So you'll keep flopper.[/COLOR]+++ I THINK ITS RANDOM, what u lose and the phd is right there to grab, so i rather lose phd instead of jugg..
Btw: its not hard to do on "first try"..
Crawlers will still kill you, they can grab you through the metal grate. (So be careful if using ray gun or anything that will make crawlers. +++
U CAN CRAWL BACK AND HAVE THEM PYLED UP AT THE VENT, u can only look up and down so get your crossshair wright before crawling backwards
Zap gun wont shoot through the metal grate. +++ MOVE PYLE UP TO THE CORNER
Best way to do the glitch...
Play normal and rack up points, then have one person buy ballistic knife, and bowie knife. And buy Mule kick and try to get RPK and HK. Pack-a-punch both, then have that person get into the glitch. Then the other person sit near the rock and shoot at the group from the rock. This will get you like 40+ easy if you don't let the dome get decompressed.