Ive twice started Bethpage Black but never finished it.
First day we had tee times on Red & Yellow -- this was years ago. As we approached the window to pay, two slots opened up on Black for the afternoon. So we switched & played Red in the morning & black in the afternoon ... and got rained out on 11.
Then the other time I got on, we didnt get off until about 3pm, then due to the notoriously slow play, we didn't get to finish.
We basically played in the almost dark on 15, but found our balls and managed to finish.
On 16 we hit our teeshots into the dark, the four of us stretched out and walked down the fairway in parallel spread out looking for each others balls, but only found 1 of the 4 and just called it a day.