Due to an unfortunate, ahem, oversight, I once reproduced the Tivoli fountain in ASF whilst doing fuel leak repairs with 71MU....the display was quite impressive actually...tanks were pressurised to whatever..the weight that was
supposed to be on the blow off valve on the upper wing suface wasn't.....it could have happened to anyone....cough !...and the system and valve worked as planned...what more could you ask for?.
ASF however, were" not very happy" with this cultural addition to their hangar...