Take note if you're ever invited to a wedding in Paris.
Make sure you don't get too carried away in the festivities by infuriating other drivers in the capital or worse still the police by joining in the potential havoc of the procession of vehicles making its way from the official ceremony to the reception.
You could end up facing a prison sentence, a fine and the suspension of your licence.
That's a lesson two guests learned the hard way after they attended a wedding at the end of April.
After tying the knot, the newlyweds and their cortège made their way on to the four-lane ring road le boulevard périphérique, creating a two-kilometre tailback.
It's a practice which according to police has become "more and more frequent in Paris" and one which "frustrates other motorists caught up in the congestion."
As the accompanying video posted on YouTube last year of a similar marriage cortège on le boulevard périphérique attests, the wedding party might be having fun, but it sure doesn't help the flow of traffic - far from it.
April's celebrations all proved too much for one motorist who put in a call to the police to put an end to the festivities after being caught up in the jam,
When they arrived, the police arrested two guests who had been "weaving from lane to lane without warning" apparently "unaware that their behaviour constituted a criminal offence."
They now face a court date at the end of May, a possible two-year prison sentence and a €4,500 fine as well as the withdrawal of their licences.
A wedding some certainly won't forget in a hurry.