Blooper

When Paul and Rachel are at the cabin talking, Rachel jumps up from seeing Ross under the couch and her hair switches back and forth from in front of her left eye and behind her ear.

When Paul brings Rachel a diet coke with ice, we see her holding the glass in her left hand. In the next shot, she's holding it in her right hand, only for it to be back in her left hand in the immediately following shot.

When Paul and Ross are talking in Central Perk, two women, one wearing a blue top and the other green enter twice behind Ross.

When Joey and Phoebe are in the dry cleaners, you see several of the same people keep walking back and forth outside the window.

Rachel clearly tosses the grape on the floor just before seeing Ross hiding under the couch.

The Museum Official tells Monica, Rachel, and Phoebe that there's a two year waiting list to have a wedding held at the museum. It is highly unlikely that one cancellation can speed up Monica and Chandler's wedding to next one in line.