Remember the 60s and the Domino Effect?

[Biggles]

Here's the 2014 version

[Nigel]

Wrong topping I guess....... ................................

[Biggles]

Wrong topping I guess.......

When I first read that I saw "wrong toppling".   

I like your suggestion.   

Those boxes would certainly make the little scooters top heavy.

[Shiney]

Brilliant

[ST.George]

The blue domino started the cascade and was reverse-parked. Looks like sum1 ripped open the blue box to get at the contents and the scoot went over. The gradient of this road favours the front-parked mopeds coz it looks slightly downhill (or is that an optical illusion?) - probabubbly, possabibbly just a coincidence.
And, as usual, red domin(o)ates - even in chaos!     

[Wild Rose]

 

[Biggles]

The blue domino started the cascade and was reverse-parked. Looks like sum1 ripped open the blue box to get at the contents and the scoot went over. The gradient of this road favours the front-parked mopeds coz it looks slightly downhill (or is that an optical illusion?) - probabubbly, possabibbly just a coincidence.
And, as usual, red domin(o)ates - even in chaos! 

Yep- I'd write something like that at 3:20 AM too...