Sly declares his "disguise sucks" and discards the hat, coat, scarf and cigar, then climbs into the baby carriage. Later, when he leaves the carriage, the baby girl has his cigar and scarf.
Obvious stunt double when Goon Bob falls down the stairs.
The homeless person who is "K.O.'d" by Sly, and then thrown into a stall in a restroom blinks, when supposedly unconscious.
At 1:08:15 when the babies are brain-washing the guy on the couch you can see a crew members hand in a green screen glove holding the toddler in place.