golang's fallthrough seems unexpected

I have the following code:

package main

import (
    "fmt"
)

func main() {
    switch {
    case 1 == 1:
        fmt.Println("1 == 1")
        fallthrough
    case 2 == 1:
        fmt.Println("2 == 1")
    }
}

Which prints both lines on the go playground - see example here. I would have expected the fallthrough statement to include evaluation of the next case statement, but this seems not to be the case.

Of course, I can always use a bunch of if statements, so this is not a real impediment, but I am curious what the intention here is, since this seems to me to be a non-obvious result.

Anyone care to explain? For example: in this code, how can I get the 1st and 3rd cases to execute?