I don't know how it worked at the time but at least now they wait until you manage to pee.
From WADA 2010 guidelines
The Witness (DCO or Chaperone) shall escort the Athlete to the toilet facility. The Athlete will carry his/her own Sample collection vessel.
The Witness shall be of the same gender as the Athlete providing the Sample. Where practicable, the DCO should ensure the Athlete thoroughly washes his/her hands before providing a Sample.
Once in the toilet facility the Athlete must remove all clothing between the waist and mid-thigh, in order that the witnessing Sample Collection Personnel has an unobstructed view of Sample provision. Sleeves should be rolled up so that the Athlete’s arms and hands are also clearly visible.
The Witness shall directly observe the Athlete provide the urine Sample, adjusting his/her position so as to have a clear view of the Sample leaving the Athlete’s body.
The DCO shall verify, in full view of the Athlete, that the Suitable Volume of Urine for Analysis has been provided.
Once a urine Sample of at least 90mL has been collected, or the Athlete has provided a partial Sample and is unable to provide any more urine at this time, the Witness shall escort the Athlete, who shall carry his/her own Sample, back to the administration area. The Athlete should be encouraged to provide as much volume as possible and Sample Collection Personnel should note where an Athlete makes attempts to provide only the bare minimum.
If an Athlete wishes to wash his/her hands after passing the Sample, the Sample shall at this time be placed in a safe and secure location, in full view of both the Athlete and the Witness.
If the Witness observes any unusual behavior by the Athlete while witnessing the passing of the Sample, this shall be reported to the DCO as soon as possible, and documented.
The Witness shall sign the relevant documentation to verify that he/she witnessed Sample provision in accordance with procedures.
In the event that an Athlete is unable to provide 90 mL of urine, the DCO shall follow the procedure for a partial Sample.
The DCO shall advise the Athlete that the partial Sample provided shall be secured and a further Sample collected.
The DCO shall instruct the Athlete to select partial Sample Collection Equipment, as per 7.1. It is recommended that there are at least three partial Sample kits from which to choose.
The DCO shall then instruct the Athlete to open the relevant equipment, pour the insufficient Sample into the container, and seal it as directed by the DCO. The DCO shall check, in full view of the Athlete, that the container has been properly sealed.
The DCO and the Athlete shall check that the equipment code number and the volume and identity of the insufficient Sample are recorded accurately by the DCO. The Athlete and DCO may initial or sign the documentation to show they are satisfied with the procedure.
The Athlete should return to the waiting area, and shall remain under observation until ready to provide a further Sample.
Either the Athlete or the DCO shall retain control of the Sample. The DCO shall ensure that the sealed partial Sample is securely stored (under continuous observation or locked away in a secure area). If the Athlete retains possession of the Sample, it must be placed in a secure area, and must remain under the observation of Sample Collection Personnel.
When the Athlete is ready to provide more urine, the Sample provision process shall recommence.
To ensure continuity of the process, and for the comfort of the Athlete, the Witness should be the same Witness as for the initial attempt, whenever possible. However, a change of Witness shall in no way affect the integrity of the process.
and so on
until he/she finally pee