does any 1 know a glitch that is easy where you can glitch without dogs or zombies getting you!! If not is there any glitches where you can get out of the map without modding. If so plz help!

All i want is to glitch and get that big baller achievement because it is so hard when you have crap teammates and my record is level 20 by myself without glitching and every single time i get that hi ...