Ok, ive seen some bad coasters, but just take a look at these pics.
http://www.rcdb.com/254.htm?p=2327
^What the hell is going on with the track after the loop?
http://www.rcdb.com/254.htm?p=1466
http://www.rcdb.com/254.htm?p=7794
^And how retarded are those loop supports?
Who was so stupid to design something that bad?