I was in the room when President Donald Trump entered and it's fair to say he got a good welcome from the crowd, certainly at the beginning. A standing ovation.
On top of that, there was an astonishing scrum to try to get in, with many turned away - even heads of state.
The security was unbelievable, not letting even some of the most famous attendees in or out of the hall.
Minutes into the speech, Trump was keeping his cool - even dropping in phrases about wanting the UK to do great.
What some thought would be the day on which the US president laid down the laws of his new global economy was filled more with grandfatherly advice.
It was far from the mildly menacing tone of his social media posts claiming that Greenland will be America's.
But which one is the real Donald Trump? Has he heard how badly some of his rhetoric has gone down?
As I entered, I was told of an astonishing event last night where Trump's Commerce Secretary Howard Lutnick told the audience that, in terms of Europe's economy, you're dead. There was a walkout. Might there have been one today? He seemed to be trying to avoid that.
At first, I thought Trump was trying on a diplomatic front, perhaps having heard some significant criticism and trying to sound mellow.
He talked in friendly terms about the western allies, but then the speech seemed to take a dark turn, when he described America's role helping Greenland in the past while still pushing for it outright.
There was high security, high stakes and high tension in the Alps for the arrival of the would-be sheriff of the world, brandishing his new rules. The mixed reactions in the room included both polite applause and shock at his contention that everyone in the hall would be speaking German without the US. The speech may have ended, but its implications will echo for a long time to come.
