Hammer, ok 300 g
https://www.youtube.com/watch?v=SSV6eT-bgz0
http://www.slate.com/blogs/bad_astronom ... iland.html
http://www.bangkokpost.com/news/general ... house-roof
https://www.youtube.com/watch?v=MMfe2DSjKFo
https://www.youtube.com/watch?v=BuR54klquvw
https://www.youtube.com/watch?v=nNF6BZCItKk
https://www.youtube.com/watch?v=EnguPXBfBOA
https://www.youtube.com/watch?v=WA9c5kxzwGM