An anonymous passenger brightened a Philadelphia cab driver's night with the tip of a lifetime: nearly $1 000 on a $4.31 fare.
Oumar Maiga's bosses revealed the hefty, holiday-season gratuity on Wednesday after waiting to make sure the credit card cleared and it wasn't an error.
The West African immigrant received the $989.98 tip on 13 December.
Maiga's bosses told Philly.com the taxi driver and passenger chatted briefly during the kilometre-long trip from the city's Old City section to Columbus Boulevard.
Maiga said his shift had been a little hectic. The passenger said he'd make it a great night and punched in the tip.
Maiga asked if he'd made a mistake. The passenger replied, "I know what I did."
Maiga's bosses said the card company wouldn't give up the mystery tipper's name.