I resin infused a carbon fiber front fender just like I normally do. This time only different were that I used IP2 infusion polyester resin instead of Epoxy that i didn't have at the moment. Infusion went very well like usually. I closed the hoses, closed the pump and leaved the part cure over night. When I came back to the warehouse, I saw that the Acrylic lid were missing from the chamber. When I looked more closely there were Acrylic pcs all over the ware house, and 4 bigger parts of the lid. Clearly somekind of explosion have happened during the night. I am usually very carefull to not leave too much resin in the resin trap, that it will not start to gain heat. I even leaved the vacuum to the chamber, so there is no oxygen that the resin could start a fire, and only around 6mm of resin were in the bottom of the chamber. So I am wondering what have happened? I dont believe that the 6mm of polyester have gained heat so much that it would made  over pressure and this would happend. Also I dont believe that the vacuum can make the acrylic lid to get broken. I am wondering that maybe the hole middle of the lid for the vacuum hose have something to do with this. Just wanted to share what happened, and maybe someone could have idea what have happened.