End of the world this saturday? may 21st doomsday?

for those who know what im talking about. the man named Harold Camping i believe speaks about the end of the world is may 21 2011. im a big believe of god but ive haven't tool this guys advise on when he believes jesus will return. lets say jesus does ok thats great but what if the guy is wrong AGAIN. he already messed up once. He's a lead speaker and has gotten alot of money from his supporters. alot of people believe him and denoted crap loads of money.. what happends if he is wrong? i expect alot of upset people.