Bruce and Christine - waitress retreats!
The waitress smiled gratefully as she handed Bruce his glass of champagne, and told him that there was a voucher for him that would be available at the front desk.
Mostly she was grateful to get away with slipping some flavorless, clear liquid into his drink. Dr. Essex's test serum was delivered to the subject. Mission complete. Down the hatch, Dr. Banner!
She quickly retreated to continue seeing to the other guests, leaving the pair to their own devices.