to get the hard badge you need to buy the bat and the ground trick left-down-right-space and the air trick up-up-up. you propably also need the dumpster with the rocket4# and then when you hit the ground do the ground trick and the air trick and as you hit the ground you do the ground trick again and then the air trick if you are lucky you get all that in one combo and so you get a high multiplicator and score
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