That's supported by the FR24 playback. At the time of the incident the queuing aircraft on twy C were (in order, from the front):
1. UAL1 B789 SFO-SIN
2. PAL115 A343 SFO-MNL
3. UAL863 B789 SFO-SYD
4. UAL1118 B739 SFO-MCO
Fortuitously, no 747s or (worse) A380s.