I definitely agree with Mungo Man, allowing the aircraft to taxi with the fuel flowing out, which is very clear from the camera that is filming, poses a huge fire risk....although I couldn't make out whether thrust reverses were used or not, and not knowing that much about which engine option Avianca use, but obviously all the core jet e flux is sent out the back when using thrust revers, which again is perfect for causing catastrophic fires (Concorde), so I'm curious why they didn't stop as quickly as poss and why fire trucks weren't quicker on the scene covering the breaks with foam and what ever else they use.