Variable GEON_THUNDEROUS_UPPERCUTConst

☰ 건 (Geon) - Heaven Attack 2: Thunderous Uppercut (천둥어퍼컷)

Rising strike targeting jaw or solar plexus with explosive upward force. Uses leg drive and hip rotation for maximum power.

Enhanced with PR #1132 mobility improvements:

• Strong hip rotation (골반회전) for upward power generation
• Knee drive (무릎밀어올림) for explosive leg power
• Spinal extension (척추확장) for upward trajectory

Duration: 300ms