Many years ago a group of us junior engineers thought it would be a jolly jape to connect our four soapbox racers together. Remove the front from three of them and connect them in turn to the back of the one in front to create a sort of articulated 10 wheel road train. Full of small boys pushing like hell from the top of a hill it went really well until we got to the corner at the bottom where the hill flattened out. I was the idiot driving so when the whole thing flexed in the middle the front end came off the ground. High speed, no steering, a lamp post and rank stupidity are why my front four teeth at the top are implants. My parents had their enthusiasm for that little event pretty much under control.
Robin