I love this type!!! I have known a few and when we talk it is pure madness. I think I have mistaken this type for my dual a few times because they are truly my activity partner (more so than Si subtype I think).
They are really good at hiding things though. Way too good, and they won't budge if you call them out on it. I think it must cause Si stress to lie or something, but Te won't hesitate as long as it saves their ass.