Halt!

Mechanics
This skill is based on enemy hostaging. The basic version will allow you to halt one enforcer per person. The aced version allows you to hostage two enforcers per person. Halted guards will drop their keycards, similar to how killing a guard will drop their card.

Halt! depends greatly on the enemy's health. Higher health enemies have a much lower chance of being halted than lower health ones.

Strategy

 * This skill is required for the Joker skill to work.
 * Halted enforcers counts as hostages, so it is really useful when paired with Hostage Taker which you can intimidate a weak enemy and get the regeneration bonus.
 * HRTs do not consider them as actual hostages, so the Hostage Taker skill could be used indefinitely until they are killed or traded.
 * This also makes Halt! useful to trade enforcers to get teammates out of custody. Do note that the trading is random and may not select the enforcer if there are civilians tied down.
 * This skill USED to be very useful for stealth on all difficulties because intimidated guards didn't count as using a pager. However as of the March 17th update, halted guards drop pagers on Extreme and above.
 * Some maps such as Mall Raid have more than four guards, so if you plan on getting the " it's not a bug, its a feature" badge, you need to hostage some guards and then kill the rest of them.
 * Hilariously on Very Hard and below, it is possible to control entire maps with four-man team with aced Halt! and Cable Guy with 8 cuffed guards, 4 killed guards and 24 civilian hostages.
 * In stealth, this skill can be used to avoid consuming a body bag, by first moving the halted guard to a desirable location then killing them.
 * Though, this is not preferable on difficulties above Very Hard as killing the guard would set off the pager, adding to the pager counter.
 * On October 8th, it's possible to move cuffed hostages by holding 'V' to move, without the need to push them.
 * Guard hostages move slower then civilian hostages, so it may be better to just push guards instead of moving them regularly to prevent anyone seeing the hostage.