Ryanair FR1919 incident in VLC 21 August 2012
Flight FR1919 from Valencia to Charleroi begun to lose fuel in a large volume while being refueled and while being boarded. The news say passengers "hurried to abandon plane"
Not sure if this was commanded by the crew or if it was an spontaneous act.
The news suggest that "passengers ran away"
The ramp was flooded by fuel.
This news link is in Spanish. You may use an online translator if you need.
http://www.elmundo.es/elmundo/2012/08/22/valencia/1345622389.html