Apart from some well known records, I am giving other unique records that are nearly impossible to break. :
SriLanka’s pacer Shaminda Eranga has grabbed his 1st wicket in 1st over of his debut in all three bolditalicbold
Michael Holding has a unique record of bowling more than 900 overs (5473 deliveries) in one day internationals without a single wide. his team mate Joel Garner is second with 5330 deliveries
Trevor Bailey of England holds the record of hitting the slowest half century in test cricket. In the 1958-59 Ashes Tour to Australia, he took 350 balls to reach his half century. This, incidentally, was also the first test match to be broadcast on television in Australia* item