What do you mean "tap somewhere else on the Keyboard?" Once I hold down the space bar and then let go, the keyboard disappears. And I just tried some combinatio

What do you mean "tap somewhere else on the Keyboard?" Once I hold down the space bar and then let go, the keyboard disappears. And I just tried some combination of this and got into a frozen state where the keyboard was missing and I had to kill Safari. EDIT: Oh, I need to use a second finger. Cool.