Fans have been wondering why the Ivorian acted in that way after meeting Bruno Fernandes's brilliant through ball with an improvised back-header over AC Milan keeper Gianluigi Donarumma at Old Trafford.
Although Simon Kjaer levelled late on to leave things on a knife-edge for the second leg of the Europa League round-of-16 tie in Italy this Thursday, Amad's actions have been a major talking point ever since.
Amad played alongside his fellow Ivorian in the Academy side at Atalanta, following Willy's move from ASEC Mimosa in his homeland.
United's no.19 posted on his Instagram story to say: 'Rest in peace, Willy Braciano Ta Bi.