Kelsi Bissonnette gets up from the audience to assist with a knife juggling act at Dr. Von Houligan's Carnival of Calamities at Desert Park on Friday evening. At left is performer Allister Denton. There were no reported fatalities or injuries. (Richard McGuire photo)

Kelsi Bissonnette gets up from the audience to assist with a knife juggling act at Dr. Von Houligan’s Carnival of Calamities at Desert Park on Friday evening. At left is performer Allister Denton. There were no reported fatalities or injuries. (Richard McGuire photo)

Kelsi Bissonnette gets up from the audience to assist with a knife juggling act at Dr. Von Houligan’s Carnival of Calamities at Desert Park on Friday evening. Performer Allister Denton is at right. There were no reported fatalities or injuries. (Richard McGuire photo)

Kelsi Bissonnette gets up from the audience to assist with a knife juggling act at Dr. Von Houligan's Carnival of Calamities at Desert Park on Friday evening. At left is performer Allister Denton. There were no reported fatalities or injuries. (Richard McGuire photo)

Kelsi Bissonnette gets up from the audience to assist with a knife juggling act at Dr. Von Houligan’s Carnival of Calamities at Desert Park on Friday evening. At left is performer Allister Denton. There were no reported fatalities or injuries. (Richard McGuire photo)

Dave McGowan gets up from the audience to try on a straight jacket during a Houdini-style escape sequence at Dr. Von Houligan's Carnival of Calamities at Desert Park on Friday evening. At right is performer Allister Denton. (Richard McGuire photo)

Dave McGowan gets up from the audience to try on a straight jacket during a Houdini-style escape sequence at Dr. Von Houligan’s Carnival of Calamities at Desert Park on Friday evening. At right is performer Allister Denton. (Richard McGuire photo)