When you say 'aggressively jumping up and down' - like it was a petulant child?
A little more please, water flow stuttering?
Machine vibrating/bouncing?
Exactly what was going on, what pressure washer, age of machine?
If it was water starvation, through a clogged filter the machine wouldn't behave as you're saying.
Too much constant use - not this.
Did you resume the clean, what happened?
When the new guys start and want help we need as much info as possible.