Plaster of Paris = burns??

[prophetspyder.livejournal.com]

My mom and I bought LePage Plaster of Paris to make Hallowe'en decorations (casts of arms, faces, etc) but when scanning some sites Mom found one that said that plaster of paris heats up when it cures and can cause severe burns! Has anyone else experienced this? I have wallpaper paste but it takes so much longer to dry than plaster of paris.

Also, any of you have good SCARY Hallowe'en sites? :D