That's a beefy amount for fees alone I can't tell if that's a mistake or intentional maybe the sender really was in kind of a hurry because with such high fees his transaction will surely be prioritized and confirmed faster than normal 100Sat/byte is really big. But if this was a mistake I think miners who have mined the transaction can help with the sender's problem.
This isn't a mistake, because every sender who needs expediting transactions specially when the demand for money is rush could solve the delays. Many concerns regarding transaction was due to slow confirmation, and if you wanted to make it fast for less than an hour, then that's the best options to do. On my perceptions, we can only apply this strategy when the amount of asset to be transferred is at large quantity.