It's well known how big a fan Jon is of Mark and Dire Straits, I expect he was gutted that Mark wasn't there on that night. I think I remember an interview with Jon saying that he wishes he had written Romeo & Juliet, as an example, look at the lyrics below to the Bon Jovi song Always:
Always.
This Romeo is bleeding
But you can't see his blood
It's nothing but some feelings
That this old dog kicked up
It's been raining since you left me
Now I'm drowning in the flood
You see, I've always been a fighter
But without you, I give up
I can't sing a love song
Like the way it's meant to be
Well, I guess I'm not that good anymore
But baby, that's just me
And I will love you, baby, always
And I'll be there forever and a day, always
I'll be there 'til the stars don't shine
'Til the heavens burst and the words don't rhyme
And I know when I die, you'll be on my mind
And I'll love you, always
Now your pictures that you left behind
Are just memories of a different life
Some that made us laugh, some that made us cry
One that made you have to say goodbye
What I'd give…