Been there man, will likely be there again with 4 kids under 5yrs old of my own.
What I've learned was how much a difference it made for the kids how we handled the... excitement. The first time it happened we were pretty much panic city, didn't impart any sort of comfort to the sickling with our shocked comments and scramble for whatever. Now we're calm and methodical. If possible, one of us stabilizes/comforts the kid while the other makes a quiet but mad dash for sheets or towels to throw down.
It's funny after a while, though often not quite so while it's going on
sympathy for your little one. hope they're feelin' better.