thud against someone or something
to thump against someone or something, making a dull noise on impact. The pumpkin thudded against Jerry, breaking open and messing up his clothes. The ball thudded against the wall and bounced back.
thud into someone or something
to bump into someone or something, making a dull noise on impact. The door blew open and thudded into Marie, giving her a bump on the knee. The ball thudded into the side of the house.