This is a discussion on Back-Alley Mugging within the online poker forums, in the General Poker section; Back-Ally Mugging or betting when a big card comes on a late street is a concept described by Dan Harrington.
A scary card arrives on
It is a nice concept I've used myself a lot with good success, but to be honest: I haven't read any works from Harrington and I've never heard this play described as "Back-Alley Mugging."
I've always just heard this play described as betting on a "scare card" but I guess "scare card" is a more generalized term because this is not restricted to only the late streets. It is possible to bet on the Flop with the same idea (like and Ace but sometimes any paint card will scare players as well). I think this "scare card" concept works better on the Turn or River though because it is only one card that has changed and makes it more obvious of what story you are trying to tell. Also obvious to many of us, but I'll comment it just for beginners, a scare card isn't only high cards. Sometimes a card that coordinates the board like putting four cards to a flush, or a card gives an open-ended straight draw on the community cards etc. can scare away opponents even more than an Ace can in many situations.
Back-Alley Mugging though lol - what craziness will Harrington come up with next?