Or toss a pack of firecrackers in the open window.
Great minds, etc., but I was thinking more along this line, courtesy eBay (dummy):
But this is probably in the UK, so she would have been hung out to dry - if she had been caught.
BTW, I don't buy this "she was wrong as well" line of apologia - it smacks of Dhimmitude. You're dealing with animals here and they only respond to the 2x4 effect. As others have said though, she was lucky those iceholes didn't get a chance to retaliate.
C-4
A LOT of it.
(Remember that scene from Chuck Norris’s, “Invasion USA?”)