“How'd you manage to pull that off?”
Your friend got four free front-row tickets to a big rock concert. You're surprised that he was able to get them, so you ask this.
How'd you manage to pull that off?
"How'd" is a contraction of "How did".
Some contractions are commonly accepted in written English, such as "can't", "won't", and "I'm". But "How'd" is still not completely accepted. You can use it when you're speaking, or when you're quoting what someone says. For example, in a novel:
"How'd she get out of the house?" Bobby asked, accusingly.
The phrase "managed to ___" means that someone succeeded in doing something, even though it was difficult. For example, if the industry you work in has been going through a bad period, but you've continued to make money, you can say:
Here's another example:
Use "pull it off" or "pull that off" when you're talking about trying something difficult or risky, but succeeding. For example, you can "pull off":
- a dangerous skateboarding trick
- getting a really beautiful woman's phone number
- passing a test that you only started studying for the night before