Anthony Tutt, 23, had a cocaine blood level that was too high to measure on laboratory equipment, and was seen speeding in his Audi A3 around Eastbourne before being pursued to his home.
Tutt claimed he took a 'big fat line' after getting out of his car after testing positive for drugs on a roadside test by police.
But when experts tried to test his blood they found the amount of the class A drug in his system was above the range a laboratory machine could test.
He was found to be at least sixteen times over the drug-drive limit, but the full level of cocaine in his system could not be fully tested for, police said.