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L4
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'''L4''' is just below [[L3]] on the PlayStation 3 controller but above L5. Just like the [[L3]]-'''L4''' space, the '''L4'''-L5 space is another potential entry point when performing a [[This is Spinal Tap|Spinal Tapspinal tap]].<ref>[http://gomerblog.com/2015/07/spinal-tap/ Tips: How to Perform a Spinal Tap on a Moving Train]</ref><ref>[http://gomerblog.com/2014/12/pain-scale-eleven/ Hospital Unveils Pain Scale That Goes to Eleven]</ref>