@ClownWorld A lot of people are saying "why are the trailer wheels not chocked". You can clearly see that they are, impact pushed trailer over them. Pay attention people.
@SusieM414141 You have to hit it head on. When hitting it at an angle, one of your tires are unloaded. You don't have Posi traction. All the power goes to one tire, so it spins. Hitting head on would send power to both tires and you'll go right up.