Movement will passively charge your pistol. For each % charge, the next shot will do 10 bonus damage. When fully charged, the next shot also stuns the target for 2 seconds. Each shot resets charge to 0%.
<Charged shot activates on special infected and tanks only>
<15s shared stun/freeze cooldown on Tanks>
<Gun recharge rate: 3% per second running, 1% crouching/walking>