<p><i><b>Hear me out: Monica and Chandler’s marriage was foreshadowed four seasons ahead of time.</b></i></p>
Let me explain. During the eighth episode of season 3, Monica and Rachel insisted on babysitting Ross’s son, Ben. While Monica was playing “airplane” with Ben, zooming him around the apartment like a plane, she accidentally whacked his head on a support beam in the kitchen.
This was before Dylan and Cole Sprouse played Ben, BTW.