5: Shortest time in a Royal Rumble match: Santino Marella - 1 second
The Royal Rumble match is supposed to be about endurance and cunning. The idea is to outlast 29 other competitors, making sure not to be eliminated in the process. The format to the match has led to many different records over the years like most amounts of eliminations, longest time spent in one match, total number of victories over the years - to name but a few.
One record that is slightly less desirable is currently held by Santino Marella. He officially stands as the man who spent the least amount of time in the ring in any one rumble match. This spot has been used over the years to either embarrass superstars or help the person who eliminated them get over.
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Guys like The Warlord, Bushwacker Luke and even Owen Hart are all high up on the list, but Santino's record is probably not going to be beaten due to the fact that he lasted just 1 second. It's hard to imagine anyone having enough time to take Santino's place, even if they wanted to do the comedy spot again in the future.
The WWE also has fewer jobbers at the moment, meaning we are less likely to see somebody embarrassed like this again. Whether or not it is beaten, I'm sure Santino Marella wouldn't have too many objections if somebody did surpass him.