DÂ brings onto land Unusual use of land with a dangerous thing and keeps it thereÂ
Giles v Walker (accumulation of weeds was natural)
The thing must be likely to cause damage if it does escape, e.g. chemicals, explosives
â—‹ Hale v Jennings (chair from chair-o-plane ride)
Includes things not inherently dangerous, provided it poses an exceptional risk if it escapes
â—‹ Rylands v Fletcher (large quantity of water)