I do know he had a certain laugh that gave people the chills, because it was his "Sinister" prank laugh.
Interesting. Do you know the source for that info? I've not heard of that before.
I've picked this information up in a book, but there are several quotes, like here's one from: "The Romanovs & Mr. Gibbs"-
"There were several battles involving scissors. 'I had a rather bad quarter' Gibbes wrote in dismay. 'He wanted to cut my hair off and he was rather disconcerted when I told him he had made a bald place...he would insist on cutting or pretending to cut everything. The more I tried to prevent him, the more he shrieked with delight' Gibbes noted, with disapproval, a change in the Tsarevitch's appearance during these outbursts. 'He doesn't look handsome then: a most curious expression.' At the time Gibbes had no idea the Tsarevitch was a hemophiliac. Had he known, he would have been considerably more disturbed by the boy's antics."
(Please understand, I pick my information up from very reliable sources, never those stupid "Dating sites". Plus I've found numerous times when others have failed to quote. But this is only one of the quotes, when I find the other, I'll put it up. So please, don't be rude, I can be smart about a subject too.)