Any big red box moment is risky.
And for a government disliked by millions there's peril at every turn.
Now the chancellor's big choices are out there, what's the best-case scenario for Reeves and Starmer, and what's the worst that could happen next?
On the positive side of the ledger, Labour MPs have gone off to their constituencies in a better mood this week. That is in large part down to the chancellor's decision to scrap the limit on bigger families getting some extra benefits.
The prime minister will revel in the argument for scrapping the cap in a big speech on Monday, suggesting it's not just the right thing to do for those in need, but the right move for the economy now and into the future. He'll also make the case the Budget will help families by easing energy bills and freezing rail fares.
And the long-awaited strategy on child poverty will likely see the light of day towards the end of the week.
It's about as clear an example of a Labour-friendly policy as there could be - redistributing taxpayers' cash to the least well-off.
One government source described it as a "restatement of values, something that MPs wanted to see, government being more bold about what it believes in and what a Labour government is".
In other words, giving Labour MPs something many of them - not just the left-wing fringe, but government ministers like Bridget Phillipson - had argued for, has cheered them right up after months of unhappiness and anxiety-fuelled conversations about what Keir Starmer stands for and whether he is up to the job.


