My sister had a party last night and my trampoline got stretched out and I don't know if it is the springs or the material and is there any way to make it tight again?

the first thing you should check is the springs, to do this remove a couple trampoline springs for the trampoline then compare them all to each other lineing them up next to each other if they are longer and some or shorter then take the longer ones and replace those. to know if Trampoloine matt is streched out is kind of hard but it is most likley the trampoline springs.