With microprocessors now ubiquitous, the computers inside trendy slot machines permit manufacturers to assign a special probability to each image on each reel. To the player, it might appear that a profitable symbol was "so shut", whereas in fact the chance is far lower. Free spins are a common form of bonus, the place a sequence of spins are automatically played at no charge at the participants current wager. Free spins are often triggered through a scatter of a {minimum of|no much less than} three designated symbols . Some games enable the free spins bonus to "retrigger", which provides additional spins on high of those already awarded.