I'm reading "The Art of the Deal" and just read a piece about his pouring the concrete for the Wollman Rink (which was seen in Limitless when the lady got away from the killer using ice skates), and how there was a long line of concrete trucks and it was carried out with military precision. The book was written in 1987.  I think he has learned a lot of skills throughout his career to make him exactly the right person for this job.  Thank you, God, for allowing me to witness.